diff --git a/deepdoc/parser/mineru_parser.py b/deepdoc/parser/mineru_parser.py
index d63a04c843..e334995a21 100644
--- a/deepdoc/parser/mineru_parser.py
+++ b/deepdoc/parser/mineru_parser.py
@@ -340,6 +340,11 @@ class MinerUParser(RAGFlowPdfParser):
         pn = [bx["page_idx"] + 1]
         positions = bx.get("bbox", (0, 0, 0, 0))
         x0, top, x1, bott = positions
+        # Normalize flipped coordinates (MinerU may report inverted bbox for flipped images)
+        if x0 > x1:
+            x0, x1 = x1, x0
+        if top > bott:
+            top, bott = bott, top
 
         if hasattr(self, "page_images") and self.page_images and len(self.page_images) > bx["page_idx"]:
             page_width, page_height = self.page_images[bx["page_idx"]].size
@@ -429,6 +434,12 @@ class MinerUParser(RAGFlowPdfParser):
 
             img0 = self.page_images[pns[0]]
             x0, y0, x1, y1 = int(left), int(top), int(right), int(min(bottom, img0.size[1]))
+            if x0 > x1:
+                x0, x1 = x1, x0
+            if y0 > y1:
+                y0, y1 = y1, y0
+            if x1 <= x0 or y1 <= y0:
+                continue
             crop0 = img0.crop((x0, y0, x1, y1))
             imgs.append(crop0)
             if 0 < ii < len(poss) - 1:
@@ -442,6 +453,13 @@ class MinerUParser(RAGFlowPdfParser):
                     continue
                 page = self.page_images[pn]
                 x0, y0, x1, y1 = int(left), 0, int(right), int(min(bottom, page.size[1]))
+                if x0 > x1:
+                    x0, x1 = x1, x0
+                if y0 > y1:
+                    y0, y1 = y1, y0
+                if x1 <= x0 or y1 <= y0:
+                    bottom -= page.size[1]
+                    continue
                 cimgp = page.crop((x0, y0, x1, y1))
                 imgs.append(cimgp)
                 if 0 < ii < len(poss) - 1: