diff --git a/lightrag_webui/src/components/documents/UploadDocumentsDialog.tsx b/lightrag_webui/src/components/documents/UploadDocumentsDialog.tsx
index 5785a7d3..16e21e7d 100644
--- a/lightrag_webui/src/components/documents/UploadDocumentsDialog.tsx
+++ b/lightrag_webui/src/components/documents/UploadDocumentsDialog.tsx
@@ -77,69 +77,77 @@ export default function UploadDocumentsDialog({ onDocumentsUploaded }: UploadDoc
         // Track errors locally to ensure we have the final state
         const uploadErrors: Record<string, string> = {}
 
-        await Promise.all(
-          filesToUpload.map(async (file) => {
-            try {
-              // Initialize upload progress
+        // Create a collator that supports Chinese sorting
+        const collator = new Intl.Collator(['zh-CN', 'en'], {
+          sensitivity: 'accent',  // consider basic characters, accents, and case
+          numeric: true           // enable numeric sorting, e.g., "File 10" will be after "File 2"
+        });
+        const sortedFiles = [...filesToUpload].sort((a, b) =>
+          collator.compare(a.name, b.name)
+        );
+
+        // Upload files in sequence, not parallel
+        for (const file of sortedFiles) {
+          try {
+            // Initialize upload progress
+            setProgresses((pre) => ({
+              ...pre,
+              [file.name]: 0
+            }))
+
+            const result = await uploadDocument(file, (percentCompleted: number) => {
+              console.debug(t('documentPanel.uploadDocuments.single.uploading', { name: file.name, percent: percentCompleted }))
               setProgresses((pre) => ({
                 ...pre,
-                [file.name]: 0
+                [file.name]: percentCompleted
               }))
+            })
 
-              const result = await uploadDocument(file, (percentCompleted: number) => {
-                console.debug(t('documentPanel.uploadDocuments.single.uploading', { name: file.name, percent: percentCompleted }))
-                setProgresses((pre) => ({
-                  ...pre,
-                  [file.name]: percentCompleted
-                }))
-              })
-
-              if (result.status === 'duplicated') {
-                uploadErrors[file.name] = t('documentPanel.uploadDocuments.fileUploader.duplicateFile')
-                setFileErrors(prev => ({
-                  ...prev,
-                  [file.name]: t('documentPanel.uploadDocuments.fileUploader.duplicateFile')
-                }))
-              } else if (result.status !== 'success') {
-                uploadErrors[file.name] = result.message
-                setFileErrors(prev => ({
-                  ...prev,
-                  [file.name]: result.message
-                }))
-              } else {
-                // Mark that we had at least one successful upload
-                hasSuccessfulUpload = true
-              }
-            } catch (err) {
-              console.error(`Upload failed for ${file.name}:`, err)
-
-              // Handle HTTP errors, including 400 errors
-              let errorMsg = errorMessage(err)
-
-              // If it's an axios error with response data, try to extract more detailed error info
-              if (err && typeof err === 'object' && 'response' in err) {
-                const axiosError = err as { response?: { status: number, data?: { detail?: string } } }
-                if (axiosError.response?.status === 400) {
-                  // Extract specific error message from backend response
-                  errorMsg = axiosError.response.data?.detail || errorMsg
-                }
-
-                // Set progress to 100% to display error message
-                setProgresses((pre) => ({
-                  ...pre,
-                  [file.name]: 100
-                }))
-              }
-
-              // Record error message in both local tracking and state
-              uploadErrors[file.name] = errorMsg
+            if (result.status === 'duplicated') {
+              uploadErrors[file.name] = t('documentPanel.uploadDocuments.fileUploader.duplicateFile')
               setFileErrors(prev => ({
                 ...prev,
-                [file.name]: errorMsg
+                [file.name]: t('documentPanel.uploadDocuments.fileUploader.duplicateFile')
+              }))
+            } else if (result.status !== 'success') {
+              uploadErrors[file.name] = result.message
+              setFileErrors(prev => ({
+                ...prev,
+                [file.name]: result.message
+              }))
+            } else {
+              // Mark that we had at least one successful upload
+              hasSuccessfulUpload = true
+            }
+          } catch (err) {
+            console.error(`Upload failed for ${file.name}:`, err)
+
+            // Handle HTTP errors, including 400 errors
+            let errorMsg = errorMessage(err)
+
+            // If it's an axios error with response data, try to extract more detailed error info
+            if (err && typeof err === 'object' && 'response' in err) {
+              const axiosError = err as { response?: { status: number, data?: { detail?: string } } }
+              if (axiosError.response?.status === 400) {
+                // Extract specific error message from backend response
+                errorMsg = axiosError.response.data?.detail || errorMsg
+              }
+
+              // Set progress to 100% to display error message
+              setProgresses((pre) => ({
+                ...pre,
+                [file.name]: 100
               }))
             }
-          })
-        )
+
+            // Record error message in both local tracking and state
+            uploadErrors[file.name] = errorMsg
+            setFileErrors(prev => ({
+              ...prev,
+              [file.name]: errorMsg
+            }))
+          }
+        }
 
         // Check if any files failed to upload using our local tracking
         const hasErrors = Object.keys(uploadErrors).length > 0