diff --git a/package/third-party/swupdate/swupdate.config b/package/third-party/swupdate/swupdate.config
index a6b7a7494..e7d633ad7 100644
--- a/package/third-party/swupdate/swupdate.config
+++ b/package/third-party/swupdate/swupdate.config
@@ -107,7 +107,7 @@ CONFIG_PARSERROOT=""
 # CONFIG_DISKPART is not set
 CONFIG_RAW=y
 # CONFIG_RDIFFHANDLER is not set
-# CONFIG_SHELLSCRIPTHANDLER is not set
+CONFIG_SHELLSCRIPTHANDLER=y
 
 #
 # archive support needs libarchive
diff --git a/target/d211/common/Recovery.gz b/target/d211/common/Recovery.gz
index f863ee863..51277ff7a 100644
Binary files a/target/d211/common/Recovery.gz and b/target/d211/common/Recovery.gz differ
diff --git a/target/d211/common/post-image.sh b/target/d211/common/post-image.sh
index 89e55beac..be5e5e880 100755
--- a/target/d211/common/post-image.sh
+++ b/target/d211/common/post-image.sh
@@ -266,6 +266,13 @@ function swupdate_pack_swu()
 
 	mk_info "Pack swu ..."
 
+	# 生成 data 增量更新包（tar.gz），替代全量 ubifs 写入
+	local DATA_DIR="${TARGET_BOARD_DIR}/data"
+	if [ -d "$DATA_DIR" ]; then
+		mk_info "Generating data_update.tar.gz ..."
+		tar -czf "${BINARIES_DIR}/data_update.tar.gz" -C "$DATA_DIR" .
+	fi
+
 	. $SWU_IMAGES
 
 	cp "$SWU_IMAGES" "$SWU_DIR"
diff --git a/target/d211/demo128_nand/rootfs_overlay/etc/ota_build_id b/target/d211/demo128_nand/rootfs_overlay/etc/ota_build_id
index 0e8962666..fb8c9c238 100644
--- a/target/d211/demo128_nand/rootfs_overlay/etc/ota_build_id
+++ b/target/d211/demo128_nand/rootfs_overlay/etc/ota_build_id
@@ -1 +1 @@
-demo128_nand-ota-marker=2026-04-27_v1001
+demo128_nand-ota-marker=2026-06-03_v1003
diff --git a/target/d211/demo128_nand/swupdate/sw-description b/target/d211/demo128_nand/swupdate/sw-description
index 2fdff2ba9..e6516c40d 100644
--- a/target/d211/demo128_nand/swupdate/sw-description
+++ b/target/d211/demo128_nand/swupdate/sw-description
@@ -104,10 +104,18 @@ software =
 					sha256 = "@system";
 				},
 				{
-					filename = "data";
-					volume = "data";
-					installed-directly = true;
-					sha256 = "@data";
+					filename = "data_update.tar.gz";
+					type = "rawfile";
+					path = "/tmp/data_update.tar.gz";
+					sha256 = "@data_update.tar.gz";
+				}
+			);
+
+			scripts: (
+				{
+					filename = "update_data.sh";
+					type = "shellscript";
+					sha256 = "@update_data.sh";
 				}
 			);
 
diff --git a/target/d211/demo128_nand/swupdate/sw-images.cfg b/target/d211/demo128_nand/swupdate/sw-images.cfg
index b727e0752..98fd6faa8 100644
--- a/target/d211/demo128_nand/swupdate/sw-images.cfg
+++ b/target/d211/demo128_nand/swupdate/sw-images.cfg
@@ -5,7 +5,8 @@ ${BINARIES_DIR}/kernel.itb:kernel
 ${BINARIES_DIR}/logo.itb:logo
 ${BINARIES_DIR}/rootfs_page_2k_block_128k.ubifs:rootfs
 ${BINARIES_DIR}/system_page_2k_block_128k.ubifs:system
-${BINARIES_DIR}/data_page_2k_block_128k.ubifs:data
+${BINARIES_DIR}/data_update.tar.gz:data_update.tar.gz
+${TARGET_BOARD_DIR}/swupdate/update_data.sh:update_data.sh
 #${BINARIES_DIR}/rootfs_page_4k_block_256k.ubifs:rootfs
 #${BINARIES_DIR}/system_page_4k_block_256k.ubifs:system
 #${BINARIES_DIR}/data_page_4k_block_256k.ubifs:data
diff --git a/target/d211/demo128_nand/swupdate/update_data.sh b/target/d211/demo128_nand/swupdate/update_data.sh
new file mode 100644
index 000000000..a2d087f76
--- /dev/null
+++ b/target/d211/demo128_nand/swupdate/update_data.sh
@@ -0,0 +1,63 @@
+#!/bin/sh
+# 增量更新 /data 分区
+# swupdate 已将 data_update.tar.gz 写到 /tmp/data_update.tar.gz
+
+# 只在 postinst 阶段执行（此时 rawfile 已经复制完成）
+if [ "$1" = "preinst" ]; then
+    echo "[update_data] preinst: skip"
+    exit 0
+fi
+
+TAR="/tmp/data_update.tar.gz"
+SRC="/tmp/data_update_src"
+DST="/mnt/data_update"
+
+if [ ! -f "$TAR" ]; then
+    echo "[update_data] ERROR: $TAR not found"
+    exit 1
+fi
+
+# 挂载 data 分区到临时挂载点
+mkdir -p "$DST"
+if ! mount -t ubifs ubi2:data "$DST"; then
+    echo "[update_data] ERROR: failed to mount ubi2:data"
+    exit 1
+fi
+echo "[update_data] mounted ubi2:data on $DST"
+
+# 解压到临时目录
+mkdir -p "$SRC"
+tar -xzf "$TAR" -C "$SRC"
+
+# 遍历升级包中的所有文件，只覆盖不一样的
+find "$SRC" -type f | while read src_file; do
+    rel_path="${src_file#$SRC/}"
+    dst_file="$DST/$rel_path"
+
+    # 目标目录不存在则创建
+    dst_dir=$(dirname "$dst_file")
+    [ -d "$dst_dir" ] || mkdir -p "$dst_dir"
+
+    if [ -f "$dst_file" ]; then
+        src_md5=$(md5sum "$src_file" | cut -d' ' -f1)
+        dst_md5=$(md5sum "$dst_file" | cut -d' ' -f1)
+        if [ "$src_md5" = "$dst_md5" ]; then
+            echo "[update_data] unchanged: $rel_path"
+            continue
+        fi
+    fi
+
+    cp "$src_file" "$dst_file"
+    echo "[update_data] updated: $rel_path"
+done
+
+# 清理临时文件
+rm -rf "$SRC" "$TAR"
+
+# 卸载 data 分区
+sync
+umount "$DST"
+echo "[update_data] unmounted $DST"
+
+echo "[update_data] done"
+exit 0