diff --git a/backend-node/src/routes/popActionRoutes.ts b/backend-node/src/routes/popActionRoutes.ts
index 730572d8..b36bc39e 100644
--- a/backend-node/src/routes/popActionRoutes.ts
+++ b/backend-node/src/routes/popActionRoutes.ts
@@ -17,6 +17,7 @@ interface AutoGenMappingInfo {
   numberingRuleId: string;
   targetColumn: string;
   showResultModal?: boolean;
+  shareAcrossItems?: boolean;
 }
 
 interface HiddenMappingInfo {
@@ -182,6 +183,31 @@ router.post("/execute-action", authenticateToken, async (req: Request, res: Resp
                 throw new Error(`유효하지 않은 테이블명: ${cardMapping.targetTable}`);
               }
 
+              const allAutoGen = [
+                ...(fieldMapping?.autoGenMappings ?? []),
+                ...(cardMapping?.autoGenMappings ?? []),
+              ];
+
+              // 일괄 채번: shareAcrossItems=true인 매핑은 루프 전 1회만 채번
+              const sharedCodes: Record<string, string> = {};
+              for (const ag of allAutoGen) {
+                if (!ag.shareAcrossItems) continue;
+                if (!ag.numberingRuleId || !ag.targetColumn) continue;
+                if (!isSafeIdentifier(ag.targetColumn)) continue;
+                try {
+                  const code = await numberingRuleService.allocateCode(
+                    ag.numberingRuleId, companyCode, { ...fieldValues, ...(items[0] ?? {}) },
+                  );
+                  sharedCodes[ag.targetColumn] = code;
+                  generatedCodes.push({ targetColumn: ag.targetColumn, code, showResultModal: ag.showResultModal ?? false });
+                  logger.info("[pop/execute-action] 일괄 채번 완료", {
+                    ruleId: ag.numberingRuleId, targetColumn: ag.targetColumn, code,
+                  });
+                } catch (err: any) {
+                  logger.error("[pop/execute-action] 일괄 채번 실패", { ruleId: ag.numberingRuleId, error: err.message });
+                }
+              }
+
               for (const item of items) {
                 const columns: string[] = ["company_code"];
                 const values: unknown[] = [companyCode];
@@ -225,23 +251,25 @@ router.post("/execute-action", authenticateToken, async (req: Request, res: Resp
                   values.push(value);
                 }
 
-                const allAutoGen = [
-                  ...(fieldMapping?.autoGenMappings ?? []),
-                  ...(cardMapping?.autoGenMappings ?? []),
-                ];
                 for (const ag of allAutoGen) {
                   if (!ag.numberingRuleId || !ag.targetColumn) continue;
                   if (!isSafeIdentifier(ag.targetColumn)) continue;
                   if (columns.includes(`"${ag.targetColumn}"`)) continue;
-                  try {
-                    const generatedCode = await numberingRuleService.allocateCode(
-                      ag.numberingRuleId, companyCode, { ...fieldValues, ...item },
-                    );
+
+                  if (ag.shareAcrossItems && sharedCodes[ag.targetColumn]) {
                     columns.push(`"${ag.targetColumn}"`);
-                    values.push(generatedCode);
-                    generatedCodes.push({ targetColumn: ag.targetColumn, code: generatedCode, showResultModal: ag.showResultModal ?? false });
-                  } catch (err: any) {
-                    logger.error("[pop/execute-action] 채번 실패", { ruleId: ag.numberingRuleId, error: err.message });
+                    values.push(sharedCodes[ag.targetColumn]);
+                  } else if (!ag.shareAcrossItems) {
+                    try {
+                      const generatedCode = await numberingRuleService.allocateCode(
+                        ag.numberingRuleId, companyCode, { ...fieldValues, ...item },
+                      );
+                      columns.push(`"${ag.targetColumn}"`);
+                      values.push(generatedCode);
+                      generatedCodes.push({ targetColumn: ag.targetColumn, code: generatedCode, showResultModal: ag.showResultModal ?? false });
+                    } catch (err: any) {
+                      logger.error("[pop/execute-action] 채번 실패", { ruleId: ag.numberingRuleId, error: err.message });
+                    }
                   }
                 }
 
@@ -448,6 +476,31 @@ router.post("/execute-action", authenticateToken, async (req: Request, res: Resp
           throw new Error(`유효하지 않은 테이블명: ${cardMapping.targetTable}`);
         }
 
+        const allAutoGen = [
+          ...(fieldMapping?.autoGenMappings ?? []),
+          ...(cardMapping?.autoGenMappings ?? []),
+        ];
+
+        // 일괄 채번: shareAcrossItems=true인 매핑은 루프 전 1회만 채번
+        const sharedCodes: Record<string, string> = {};
+        for (const ag of allAutoGen) {
+          if (!ag.shareAcrossItems) continue;
+          if (!ag.numberingRuleId || !ag.targetColumn) continue;
+          if (!isSafeIdentifier(ag.targetColumn)) continue;
+          try {
+            const code = await numberingRuleService.allocateCode(
+              ag.numberingRuleId, companyCode, { ...fieldValues, ...(items[0] ?? {}) },
+            );
+            sharedCodes[ag.targetColumn] = code;
+            generatedCodes.push({ targetColumn: ag.targetColumn, code, showResultModal: ag.showResultModal ?? false });
+            logger.info("[pop/execute-action] 일괄 채번 완료", {
+              ruleId: ag.numberingRuleId, targetColumn: ag.targetColumn, code,
+            });
+          } catch (err: any) {
+            logger.error("[pop/execute-action] 일괄 채번 실패", { ruleId: ag.numberingRuleId, error: err.message });
+          }
+        }
+
         for (const item of items) {
           const columns: string[] = ["company_code"];
           const values: unknown[] = [companyCode];
@@ -467,7 +520,6 @@ router.post("/execute-action", authenticateToken, async (req: Request, res: Resp
             }
           }
 
-          // 숨은 필드 매핑 처리 (고정값 / JSON추출 / DB컬럼)
           const allHidden = [
             ...(fieldMapping?.hiddenMappings ?? []),
             ...(cardMapping?.hiddenMappings ?? []),
@@ -494,34 +546,28 @@ router.post("/execute-action", authenticateToken, async (req: Request, res: Resp
             values.push(value);
           }
 
-          // 채번 규칙 실행: field + cardList의 autoGenMappings에서 코드 발급
-          const allAutoGen = [
-            ...(fieldMapping?.autoGenMappings ?? []),
-            ...(cardMapping?.autoGenMappings ?? []),
-          ];
           for (const ag of allAutoGen) {
             if (!ag.numberingRuleId || !ag.targetColumn) continue;
             if (!isSafeIdentifier(ag.targetColumn)) continue;
             if (columns.includes(`"${ag.targetColumn}"`)) continue;
-            try {
-              const generatedCode = await numberingRuleService.allocateCode(
-                ag.numberingRuleId,
-                companyCode,
-                { ...fieldValues, ...item },
-              );
+
+            if (ag.shareAcrossItems && sharedCodes[ag.targetColumn]) {
               columns.push(`"${ag.targetColumn}"`);
-              values.push(generatedCode);
-              generatedCodes.push({ targetColumn: ag.targetColumn, code: generatedCode, showResultModal: ag.showResultModal ?? false });
-              logger.info("[pop/execute-action] 채번 완료", {
-                ruleId: ag.numberingRuleId,
-                targetColumn: ag.targetColumn,
-                generatedCode,
-              });
-            } catch (err: any) {
-              logger.error("[pop/execute-action] 채번 실패", {
-                ruleId: ag.numberingRuleId,
-                error: err.message,
-              });
+              values.push(sharedCodes[ag.targetColumn]);
+            } else if (!ag.shareAcrossItems) {
+              try {
+                const generatedCode = await numberingRuleService.allocateCode(
+                  ag.numberingRuleId, companyCode, { ...fieldValues, ...item },
+                );
+                columns.push(`"${ag.targetColumn}"`);
+                values.push(generatedCode);
+                generatedCodes.push({ targetColumn: ag.targetColumn, code: generatedCode, showResultModal: ag.showResultModal ?? false });
+                logger.info("[pop/execute-action] 채번 완료", {
+                  ruleId: ag.numberingRuleId, targetColumn: ag.targetColumn, generatedCode,
+                });
+              } catch (err: any) {
+                logger.error("[pop/execute-action] 채번 실패", { ruleId: ag.numberingRuleId, error: err.message });
+              }
             }
           }
 
diff --git a/frontend/lib/registry/pop-components/pop-field/PopFieldComponent.tsx b/frontend/lib/registry/pop-components/pop-field/PopFieldComponent.tsx
index dace22f6..7ad256ff 100644
--- a/frontend/lib/registry/pop-components/pop-field/PopFieldComponent.tsx
+++ b/frontend/lib/registry/pop-components/pop-field/PopFieldComponent.tsx
@@ -228,6 +228,7 @@ export function PopFieldComponent({
                     numberingRuleId: m.numberingRuleId!,
                     targetColumn: m.targetColumn,
                     showResultModal: m.showResultModal,
+                    shareAcrossItems: m.shareAcrossItems ?? false,
                   })),
                 hiddenMappings: (cfg.saveConfig.hiddenMappings || [])
                   .filter((m) => m.targetColumn)
diff --git a/frontend/lib/registry/pop-components/pop-field/PopFieldConfig.tsx b/frontend/lib/registry/pop-components/pop-field/PopFieldConfig.tsx
index 8b5beb84..20fccca3 100644
--- a/frontend/lib/registry/pop-components/pop-field/PopFieldConfig.tsx
+++ b/frontend/lib/registry/pop-components/pop-field/PopFieldConfig.tsx
@@ -1337,7 +1337,19 @@ function SaveTabContent({
                       />
                       <Label className="text-[10px]">결과 모달</Label>
                     </div>
+                    <div className="flex items-center gap-1.5">
+                      <Switch
+                        checked={m.shareAcrossItems ?? false}
+                        onCheckedChange={(v) => updateAutoGenMapping(m.id, { shareAcrossItems: v })}
+                      />
+                      <Label className="text-[10px]">일괄 채번</Label>
+                    </div>
                   </div>
+                  {m.shareAcrossItems && (
+                    <p className="text-[9px] text-muted-foreground">
+                      저장되는 모든 행에 동일한 번호를 부여합니다
+                    </p>
+                  )}
                 </div>
               );
             })}
diff --git a/frontend/lib/registry/pop-components/pop-field/types.ts b/frontend/lib/registry/pop-components/pop-field/types.ts
index 7118d0a6..f0813e6c 100644
--- a/frontend/lib/registry/pop-components/pop-field/types.ts
+++ b/frontend/lib/registry/pop-components/pop-field/types.ts
@@ -153,6 +153,7 @@ export interface PopFieldAutoGenMapping {
   numberingRuleId?: string;
   showInForm: boolean;
   showResultModal: boolean;
+  shareAcrossItems?: boolean;
 }
 
 export interface PopFieldSaveConfig {
diff --git a/frontend/lib/registry/pop-components/pop-search/PopSearchComponent.tsx b/frontend/lib/registry/pop-components/pop-search/PopSearchComponent.tsx
index 0cb0d1a9..44fc6dcc 100644
--- a/frontend/lib/registry/pop-components/pop-search/PopSearchComponent.tsx
+++ b/frontend/lib/registry/pop-components/pop-search/PopSearchComponent.tsx
@@ -140,6 +140,11 @@ export function PopSearchComponent({
     [config.modalConfig, emitFilterChanged]
   );
 
+  const handleModalClear = useCallback(() => {
+    setModalDisplayText("");
+    emitFilterChanged("");
+  }, [emitFilterChanged]);
+
   const showLabel = config.labelVisible !== false && !!config.labelText;
 
   return (
@@ -158,6 +163,7 @@ export function PopSearchComponent({
           onChange={emitFilterChanged}
           modalDisplayText={modalDisplayText}
           onModalOpen={handleModalOpen}
+          onModalClear={handleModalClear}
         />
       </div>
 
@@ -184,9 +190,10 @@ interface InputRendererProps {
   onChange: (v: unknown) => void;
   modalDisplayText?: string;
   onModalOpen?: () => void;
+  onModalClear?: () => void;
 }
 
-function SearchInputRenderer({ config, value, onChange, modalDisplayText, onModalOpen }: InputRendererProps) {
+function SearchInputRenderer({ config, value, onChange, modalDisplayText, onModalOpen, onModalClear }: InputRendererProps) {
   const normalized = normalizeInputType(config.inputType as string);
   switch (normalized) {
     case "text":
@@ -205,7 +212,7 @@ function SearchInputRenderer({ config, value, onChange, modalDisplayText, onModa
     case "toggle":
       return <ToggleSearchInput value={Boolean(value)} onChange={onChange} />;
     case "modal":
-      return <ModalSearchInput config={config} displayText={modalDisplayText || ""} onClick={onModalOpen} />;
+      return <ModalSearchInput config={config} displayText={modalDisplayText || ""} onClick={onModalOpen} onClear={onModalClear} />;
     default:
       return <PlaceholderInput inputType={config.inputType} />;
   }
@@ -589,7 +596,9 @@ function ToggleSearchInput({ value, onChange }: { value: boolean; onChange: (v:
 // modal 서브타입: 읽기 전용 표시 + 클릭으로 모달 열기
 // ========================================
 
-function ModalSearchInput({ config, displayText, onClick }: { config: PopSearchConfig; displayText: string; onClick?: () => void }) {
+function ModalSearchInput({ config, displayText, onClick, onClear }: { config: PopSearchConfig; displayText: string; onClick?: () => void; onClear?: () => void }) {
+  const hasValue = !!displayText;
+
   return (
     <div
       className="flex h-full min-h-8 cursor-pointer items-center rounded-md border border-input bg-background px-3 transition-colors hover:bg-accent"
@@ -598,8 +607,21 @@ function ModalSearchInput({ config, displayText, onClick }: { config: PopSearchC
       onClick={onClick}
       onKeyDown={(e) => { if (e.key === "Enter" || e.key === " ") onClick?.(); }}
     >
-      <span className="flex-1 truncate text-xs">{displayText || config.placeholder || "선택..."}</span>
-      <ChevronRight className="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
+      <span className={`flex-1 truncate text-xs ${hasValue ? "" : "text-muted-foreground"}`}>
+        {displayText || config.placeholder || "선택..."}
+      </span>
+      {hasValue && onClear ? (
+        <button
+          type="button"
+          className="ml-1 shrink-0 rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-destructive/10 hover:text-destructive"
+          onClick={(e) => { e.stopPropagation(); onClear(); }}
+          aria-label="선택 해제"
+        >
+          <X className="h-3.5 w-3.5" />
+        </button>
+      ) : (
+        <ChevronRight className="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
+      )}
     </div>
   );
 }
@@ -678,6 +700,7 @@ function ModalDialog({ open, onOpenChange, modalConfig, title, onSelect }: Modal
     columnLabels,
     displayStyle = "table",
     displayField,
+    distinct,
   } = modalConfig;
 
   const colsToShow = displayColumns && displayColumns.length > 0 ? displayColumns : [];
@@ -689,13 +712,25 @@ function ModalDialog({ open, onOpenChange, modalConfig, title, onSelect }: Modal
     setLoading(true);
     try {
       const result = await dataApi.getTableData(tableName, { page: 1, size: 200 });
-      setAllRows(result.data || []);
+      let rows = result.data || [];
+
+      if (distinct && displayField) {
+        const seen = new Set<string>();
+        rows = rows.filter((row) => {
+          const val = String(row[displayField] ?? "");
+          if (seen.has(val)) return false;
+          seen.add(val);
+          return true;
+        });
+      }
+
+      setAllRows(rows);
     } catch {
       setAllRows([]);
     } finally {
       setLoading(false);
     }
-  }, [tableName]);
+  }, [tableName, distinct, displayField]);
 
   useEffect(() => {
     if (open) {
diff --git a/frontend/lib/registry/pop-components/pop-search/PopSearchConfig.tsx b/frontend/lib/registry/pop-components/pop-search/PopSearchConfig.tsx
index e91ce7d9..4c52961b 100644
--- a/frontend/lib/registry/pop-components/pop-search/PopSearchConfig.tsx
+++ b/frontend/lib/registry/pop-components/pop-search/PopSearchConfig.tsx
@@ -997,6 +997,21 @@ function ModalDetailSettings({ cfg, update }: StepProps) {
             </p>
           </div>
 
+          {/* 중복 제거 (Distinct) */}
+          <div className="space-y-1">
+            <div className="flex items-center gap-1.5">
+              <Checkbox
+                id="modal_distinct"
+                checked={mc.distinct ?? false}
+                onCheckedChange={(checked) => updateModal({ distinct: !!checked })}
+              />
+              <Label htmlFor="modal_distinct" className="text-[10px]">중복 제거 (Distinct)</Label>
+            </div>
+            <p className="text-[9px] text-muted-foreground">
+              표시 필드 기준으로 동일한 값이 여러 건이면 하나만 표시
+            </p>
+          </div>
+
           {/* 검색창에 보일 값 */}
           <div className="space-y-1">
             <Label className="text-[10px]">검색창에 보일 값</Label>
diff --git a/frontend/lib/registry/pop-components/pop-search/types.ts b/frontend/lib/registry/pop-components/pop-search/types.ts
index 220d5ff9..6da0ae32 100644
--- a/frontend/lib/registry/pop-components/pop-search/types.ts
+++ b/frontend/lib/registry/pop-components/pop-search/types.ts
@@ -73,6 +73,9 @@ export interface ModalSelectConfig {
 
   displayField: string;
   valueField: string;
+
+  /** displayField 기준 중복 제거 */
+  distinct?: boolean;
 }
 
 /** pop-search 전체 설정 */