diff --git a/frontend/contexts/ReportDesignerContext.tsx b/frontend/contexts/ReportDesignerContext.tsx
index 42fb9504..3db07bc9 100644
--- a/frontend/contexts/ReportDesignerContext.tsx
+++ b/frontend/contexts/ReportDesignerContext.tsx
@@ -147,6 +147,40 @@ interface ReportDesignerContextType {
 
 const ReportDesignerContext = createContext<ReportDesignerContextType | undefined>(undefined);
 
+// 페이지 사이즈 변경 시 컴포넌트 위치 및 크기 재계산 유틸리티 함수
+const recalculateComponentPositions = (
+  components: ComponentConfig[],
+  oldWidth: number,
+  oldHeight: number,
+  newWidth: number,
+  newHeight: number
+): ComponentConfig[] => {
+  // 사이즈가 동일하면 그대로 반환
+  if (oldWidth === newWidth && oldHeight === newHeight) {
+    return components;
+  }
+
+  const widthRatio = newWidth / oldWidth;
+  const heightRatio = newHeight / oldHeight;
+
+  return components.map((comp) => {
+    // 위치와 크기 모두 비율대로 재계산
+    // 소수점 2자리까지만 유지
+    const newX = Math.round(comp.x * widthRatio * 100) / 100;
+    const newY = Math.round(comp.y * heightRatio * 100) / 100;
+    const newCompWidth = Math.round(comp.width * widthRatio * 100) / 100;
+    const newCompHeight = Math.round(comp.height * heightRatio * 100) / 100;
+
+    return {
+      ...comp,
+      x: newX,
+      y: newY,
+      width: newCompWidth,
+      height: newCompHeight,
+    };
+  });
+};
+
 export function ReportDesignerProvider({ reportId, children }: { reportId: string; children: ReactNode }) {
   const [reportDetail, setReportDetail] = useState<ReportDetail | null>(null);
   const [layout, setLayout] = useState<ReportLayout | null>(null);
@@ -994,10 +1028,42 @@ export function ReportDesignerProvider({ reportId, children }: { reportId: strin
   }, []);
 
   const updatePageSettings = useCallback((pageId: string, settings: Partial<ReportPage>) => {
-    setLayoutConfig((prev) => ({
-      ...prev,
-      pages: prev.pages.map((page) => (page.page_id === pageId ? { ...page, ...settings } : page)),
-    }));
+    setLayoutConfig((prev) => {
+      const targetPage = prev.pages.find((p) => p.page_id === pageId);
+      if (!targetPage) {
+        return prev;
+      }
+
+      // 페이지 사이즈 변경 감지
+      const isWidthChanging = settings.width !== undefined && settings.width !== targetPage.width;
+      const isHeightChanging = settings.height !== undefined && settings.height !== targetPage.height;
+
+      // 사이즈 변경 시 컴포넌트 위치 재계산
+      let updatedComponents = targetPage.components;
+      if (isWidthChanging || isHeightChanging) {
+        const oldWidth = targetPage.width;
+        const oldHeight = targetPage.height;
+        const newWidth = settings.width ?? targetPage.width;
+        const newHeight = settings.height ?? targetPage.height;
+
+        updatedComponents = recalculateComponentPositions(
+          targetPage.components,
+          oldWidth,
+          oldHeight,
+          newWidth,
+          newHeight
+        );
+      }
+
+      return {
+        ...prev,
+        pages: prev.pages.map((page) =>
+          page.page_id === pageId
+            ? { ...page, ...settings, components: updatedComponents }
+            : page
+        ),
+      };
+    });
   }, []);
 
   // 전체 페이지 공유 워터마크 업데이트