diff --git a/post_pro/merge_tif.py b/post_pro/merge_tif.py
index d3c23e4..9ed3a8f 100644
--- a/post_pro/merge_tif.py
+++ b/post_pro/merge_tif.py
@@ -8,12 +8,14 @@ import fiona
 from edt import edt
 import numpy as np
 import math
+from post_pro.trans_orthophoto import TransOrthophoto
 
 
 class MergeTif:
     def __init__(self, output_dir: str):
         self.output_dir = output_dir
         self.logger = logging.getLogger('UAV_Preprocess.MergeTif')
+        self.trans_orthophoto = TransOrthophoto()
 
     def merge_orthophoto(self, grid_lt):
         """合并网格的正射影像"""
@@ -51,8 +53,11 @@ class MergeTif:
             }
             self.merge(all_orthos_and_ortho_cuts, os.path.join(
                 self.output_dir, "orthophoto.tif"), orthophoto_vars)
-
             self.logger.info("所有产品合并完成")
+
+            self.trans_orthophoto.trans_to_epsg4326(os.path.join(self.output_dir, "orthophoto.tif"), os.path.join(
+                self.output_dir, "orthophoto_epsg4326.tif"))
+
         except Exception as e:
             self.logger.error(f"产品合并过程中发生错误: {str(e)}", exc_info=True)
             raise
diff --git a/post_pro/trans_orthophoto.py b/post_pro/trans_orthophoto.py
new file mode 100644
index 0000000..4422879
--- /dev/null
+++ b/post_pro/trans_orthophoto.py
@@ -0,0 +1,40 @@
+import logging
+import rasterio
+from rasterio.warp import calculate_default_transform, reproject, Resampling
+
+
+class TransOrthophoto:
+    def __init__(self):
+        self.logger = logging.getLogger('UAV_Preprocess.TransOrthophoto')
+
+    def trans_to_epsg4326(self, ori_orthophoto_path: str, output_path: str):
+        # 打开原始文件
+        with rasterio.open(ori_orthophoto_path) as src:
+            # 定义目标 CRS
+            dst_crs = 'EPSG:4326'
+
+            # 计算目标变换和元数据
+            transform, width, height = calculate_default_transform(
+                src.crs, dst_crs, src.width, src.height, *src.bounds)
+            kwargs = src.meta.copy()
+            kwargs.update({
+                'crs': dst_crs,
+                'transform': transform,
+                'width': width,
+                'height': height
+            })
+
+            # 创建重投影后的文件
+            with rasterio.open(output_path, 'w', **kwargs) as dst:
+                for i in range(1, src.count + 1):
+                    reproject(
+                        source=rasterio.band(src, i),
+                        destination=rasterio.band(dst, i),
+                        src_transform=src.transform,
+                        src_crs=src.crs,
+                        dst_transform=transform,
+                        dst_crs=dst_crs,
+                        resampling=Resampling.nearest
+                    )
+
+        self.logger.info(f"文件已成功重投影")