diff --git a/pkg/channels/qq/qq.go b/pkg/channels/qq/qq.go
index cd66964dd..4ea71f6df 100644
--- a/pkg/channels/qq/qq.go
+++ b/pkg/channels/qq/qq.go
@@ -357,6 +357,7 @@ type qqMediaUpload struct {
 	FileType   uint64 `json:"file_type"`
 	URL        string `json:"url,omitempty"`
 	FileData   string `json:"file_data,omitempty"`
+	FileName   string `json:"file_name,omitempty"`
 	SrvSendMsg bool   `json:"srv_send_msg,omitempty"`
 }
 
@@ -393,6 +394,7 @@ func (c *QQChannel) buildMediaUpload(part bus.MediaPart) (*qqMediaUpload, error)
 	if isHTTPURL(mediaRef) {
 		payload.FileType = qqFileType(c.outboundMediaType(part, ""))
 		payload.URL = mediaRef
+		payload.FileName = qqUploadFilename(part, mediaRef, payload.FileType)
 		return payload, nil
 	}
 
@@ -415,9 +417,11 @@ func (c *QQChannel) buildMediaUpload(part bus.MediaPart) (*qqMediaUpload, error)
 	if isHTTPURL(resolved) {
 		payload.FileType = qqFileType(c.outboundMediaType(part, ""))
 		payload.URL = resolved
+		payload.FileName = qqUploadFilename(part, resolved, payload.FileType)
 		return payload, nil
 	}
 	payload.FileType = qqFileType(c.outboundMediaType(part, resolved))
+	payload.FileName = qqUploadFilename(part, resolved, payload.FileType)
 
 	if limitBytes := c.maxBase64FileSizeBytes(); limitBytes > 0 {
 		info, statErr := os.Stat(resolved)
@@ -444,6 +448,28 @@ func (c *QQChannel) buildMediaUpload(part bus.MediaPart) (*qqMediaUpload, error)
 	return payload, nil
 }
 
+func qqUploadFilename(part bus.MediaPart, resolved string, fileType uint64) string {
+	if fileType != qqFileType("file") {
+		return ""
+	}
+	if part.Filename != "" {
+		return part.Filename
+	}
+	if isHTTPURL(resolved) {
+		if parsed, err := url.Parse(resolved); err == nil {
+			if base := path.Base(parsed.Path); base != "" && base != "." && base != "/" {
+				return base
+			}
+		}
+		return ""
+	}
+
+	if base := filepath.Base(resolved); base != "" && base != "." {
+		return base
+	}
+	return ""
+}
+
 func (c *QQChannel) outboundMediaType(part bus.MediaPart, localPath string) string {
 	if part.Type != "audio" {
 		return part.Type
diff --git a/pkg/channels/qq/qq_test.go b/pkg/channels/qq/qq_test.go
index 108965c00..7ed736827 100644
--- a/pkg/channels/qq/qq_test.go
+++ b/pkg/channels/qq/qq_test.go
@@ -444,6 +444,9 @@ func TestSendMedia_UsesRemoteURLUploadForC2C(t *testing.T) {
 	if upload.body.FileType != 4 {
 		t.Fatalf("upload file_type = %d, want 4", upload.body.FileType)
 	}
+	if upload.body.FileName != "report.pdf" {
+		t.Fatalf("upload file_name = %q, want report.pdf", upload.body.FileName)
+	}
 
 	if len(api.c2cMessages) != 1 {
 		t.Fatalf("c2cMessages = %d, want 1", len(api.c2cMessages))
@@ -460,6 +463,59 @@ func TestSendMedia_UsesRemoteURLUploadForC2C(t *testing.T) {
 	}
 }
 
+func TestSendMedia_LocalFileUploadIncludesStoredFilename(t *testing.T) {
+	messageBus := bus.NewMessageBus()
+	store := media.NewFileMediaStore()
+
+	localPath := writeTempFile(t, t.TempDir(), "report.pdf", []byte("fake-pdf"))
+	ref, err := store.Store(localPath, media.MediaMeta{
+		Filename:    "report.pdf",
+		ContentType: "application/pdf",
+	}, "qq:test")
+	if err != nil {
+		t.Fatalf("Store() error = %v", err)
+	}
+
+	api := &fakeQQAPI{
+		transportResp: mustJSON(t, dto.Message{FileInfo: []byte("local-file-info")}),
+	}
+	ch := &QQChannel{
+		BaseChannel: channels.NewBaseChannel("qq", nil, messageBus, nil),
+		api:         api,
+		dedup:       make(map[string]time.Time),
+		done:        make(chan struct{}),
+		ctx:         context.Background(),
+	}
+	ch.SetRunning(true)
+	ch.SetMediaStore(store)
+	ch.chatType.Store("user-1", "direct")
+
+	err = ch.SendMedia(context.Background(), bus.OutboundMediaMessage{
+		ChatID: "user-1",
+		Parts: []bus.MediaPart{{
+			Type: "file",
+			Ref:  ref,
+		}},
+	})
+	if err != nil {
+		t.Fatalf("SendMedia() error = %v", err)
+	}
+
+	if len(api.transportCalls) != 1 {
+		t.Fatalf("transportCalls = %d, want 1", len(api.transportCalls))
+	}
+	upload := api.transportCalls[0]
+	if upload.body.FileType != 4 {
+		t.Fatalf("upload file_type = %d, want 4", upload.body.FileType)
+	}
+	if upload.body.FileName != "report.pdf" {
+		t.Fatalf("upload file_name = %q, want report.pdf", upload.body.FileName)
+	}
+	if upload.body.FileData == "" {
+		t.Fatal("upload file_data = empty, want base64 payload")
+	}
+}
+
 func TestSendMedia_ReturnsSendFailedWithoutMediaStore(t *testing.T) {
 	messageBus := bus.NewMessageBus()
 	ch := &QQChannel{