diff --git a/packages/renderless/src/file-upload/index.ts b/packages/renderless/src/file-upload/index.ts
index dc41222360..738225e9a9 100644
--- a/packages/renderless/src/file-upload/index.ts
+++ b/packages/renderless/src/file-upload/index.ts
@@ -393,13 +393,35 @@ export const properFileSize =
     if ([undefined, null].includes(file.size)) return true
 
     let maxSize = 0
-    state.singleMaxSize = props.edm.singleFileMaxSize || state.singleMaxSize || 200
-    if (Array.isArray(props.fileSize) && props.fileSize[1]) {
-      maxSize = state.isEdm
-        ? Math.min(state.singleMaxSize, Number(props.fileSize[1]) / 1024)
-        : Math.max(Number(props.fileSize[0]) / 1024, Number(props.fileSize[1]) / 1024)
+    // 优先级：result.config.singleFileMaxSize > props.edm.config.singleFileMaxSize > props.fileSize > props.edm.singleFileMaxSize > state.singleMaxSize(默认200KB)
+    // 注意：singleFileMaxSize 的单位是 KB，需要转换为 MB 进行比较
+    const edmConfigSingleFileMaxSize =
+      state.edmToken?.config?.singleFileMaxSize || props.edm?.config?.singleFileMaxSize
+        ? (state.edmToken?.config?.singleFileMaxSize || props.edm?.config?.singleFileMaxSize) / 1024 // 转换为 MB
+        : null
+
+    if (state.isEdm) {
+      // EDM 模式下，优先级：edm.config.singleFileMaxSize > props.fileSize > state.singleMaxSize
+      if (edmConfigSingleFileMaxSize !== null) {
+        // 优先使用 edm.config.singleFileMaxSize
+        maxSize = edmConfigSingleFileMaxSize
+      } else if (Array.isArray(props.fileSize) && props.fileSize[1]) {
+        // 如果有 props.fileSize 数组，使用最大值（上限），单位从 KB 转为 MB
+        maxSize = Number(props.fileSize[1]) / 1024
+      } else if (props.fileSize) {
+        // 如果有 props.fileSize，使用它，单位从 KB 转为 MB
+        maxSize = Number(props.fileSize) / 1024
+      } else {
+        // 最后才使用 state.singleMaxSize（默认值 200KB），单位从 KB 转为 MB
+        maxSize = state.singleMaxSize / 1024
+      }
     } else {
-      maxSize = state.isEdm ? Math.min(state.singleMaxSize) : Number(props.fileSize) / 1024
+      // 非 EDM 模式，使用 props.fileSize
+      if (Array.isArray(props.fileSize) && props.fileSize[1]) {
+        maxSize = Math.max(Number(props.fileSize[0]) / 1024, Number(props.fileSize[1]) / 1024)
+      } else {
+        maxSize = Number(props.fileSize) / 1024
+      }
     }
 
     if (state.isEdm || (Array.isArray(props.fileSize) && props.fileSize[1])) {