diff --git a/README.md b/README.md
index 9b537c5..a151e0c 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,11 @@ sudo ./scripts/install.sh
 ```
 
 - 超过60分钟的0字节 raw，如果未被进程占用，也会按上述三件套删除；
+- 对`<base>_raw.mp4.partN.mp4`录制残留执行整组安全检查：
+  - 同一base的所有part都必须超过60分钟、全部为0字节且均未被进程打开；
+  - 如果正式`<base>_raw.mp4`已经存在，只删除符合条件的残留part，保留正常三件套；
+  - 如果正式raw不存在，删除全部残留part及对应的annotated视频和XML；
+  - 任一part仍较新、非0字节或正在使用时，整组跳过；
 - 空闲低于3GiB时暂停整个 `smart_camera` 进程（持续检测、录像和识别一起暂停），Producer继续上传，并输出 CRITICAL 告警；
 - 暂停期间每2分钟检查一次；
 - 清理使空闲恢复到5GiB后自动恢复 `smart_camera`；程序重新持续检测，达到鸟类确认门控后再录像和识别，并停止2分钟快速检查；
diff --git a/bin/cleanup-smartcam-data b/bin/cleanup-smartcam-data
index a5026bb..892e592 100755
--- a/bin/cleanup-smartcam-data
+++ b/bin/cleanup-smartcam-data
@@ -224,9 +224,97 @@ delete_stale_zero_bundles() {
   fi
 }
 
+delete_stale_zero_part_bundles() {
+  local part filename base final_raw sibling path size
+  local safe part_count deleted_bundles=0 deleted_files=0 deleted_bytes=0
+  declare -A checked_bases=()
+
+  while IFS= read -r -d '' part; do
+    [[ -f "$part" ]] || continue
+    filename="$(basename "$part")"
+    base="${filename%%_raw.mp4.part*}"
+    [[ -n "$base" && -z "${checked_bases[$base]:-}" ]] || continue
+    checked_bases["$base"]=1
+    final_raw="$DATA_ROOT/videos_raw/${base}_raw.mp4"
+
+    # If a valid final raw exists, these are harmless recorder leftovers.
+    # Delete only old, zero-byte, unopened part files; preserve the bundle.
+    if [[ -f "$final_raw" ]]; then
+      while IFS= read -r -d '' sibling; do
+        find "$sibling" -mmin "+${MIN_FILE_AGE_MINUTES}" -print -quit 2>/dev/null |
+          grep -q . || continue
+        if command -v fuser >/dev/null 2>&1 && fuser -s "$sibling" 2>/dev/null; then
+          log WARNING "stale zero-byte part is still open; skipped: ${sibling}"
+          continue
+        fi
+        if rm -f -- "$sibling"; then
+          deleted_files=$((deleted_files + 1))
+          log INFO "deleted stale zero-byte recorder part: ${sibling}"
+        fi
+      done < <(find "$DATA_ROOT/videos_raw" -maxdepth 1 -type f \
+        -name "${base}_raw.mp4.part*.mp4" -size 0 -print0 2>/dev/null)
+      continue
+    fi
+
+    # Without a final raw, only remove the incomplete bundle when every part
+    # is old, zero bytes, and not held open by any process.
+    safe=1
+    part_count=0
+    while IFS= read -r -d '' sibling; do
+      part_count=$((part_count + 1))
+      [[ "$(stat -c %s "$sibling" 2>/dev/null || printf 1)" -eq 0 ]] || {
+        safe=0
+        break
+      }
+      find "$sibling" -mmin "+${MIN_FILE_AGE_MINUTES}" -print -quit 2>/dev/null |
+        grep -q . || {
+        safe=0
+        break
+      }
+      if command -v fuser >/dev/null 2>&1 && fuser -s "$sibling" 2>/dev/null; then
+        log WARNING "incomplete part bundle is still open; skipped: ${sibling}"
+        safe=0
+        break
+      fi
+    done < <(find "$DATA_ROOT/videos_raw" -maxdepth 1 -type f \
+      -name "${base}_raw.mp4.part*.mp4" -print0 2>/dev/null)
+
+    [[ "$safe" -eq 1 && "$part_count" -gt 0 ]] || continue
+
+    while IFS= read -r -d '' sibling; do
+      size="$(stat -c %s "$sibling" 2>/dev/null || printf 0)"
+      if rm -f -- "$sibling"; then
+        deleted_files=$((deleted_files + 1))
+        deleted_bytes=$((deleted_bytes + size))
+        log INFO "deleted stale incomplete bundle part: ${sibling}"
+      fi
+    done < <(find "$DATA_ROOT/videos_raw" -maxdepth 1 -type f \
+      -name "${base}_raw.mp4.part*.mp4" -print0 2>/dev/null)
+
+    for path in \
+      "$DATA_ROOT/videos/${base}_annotated.mp4" \
+      "$DATA_ROOT/annotations/${base}.xml"; do
+      [[ -f "$path" ]] || continue
+      size="$(stat -c %s "$path" 2>/dev/null || printf 0)"
+      if rm -f -- "$path"; then
+        deleted_files=$((deleted_files + 1))
+        deleted_bytes=$((deleted_bytes + size))
+        log INFO "deleted stale incomplete bundle member: ${path}"
+      fi
+    done
+    deleted_bundles=$((deleted_bundles + 1))
+  done < <(find "$DATA_ROOT/videos_raw" -maxdepth 1 -type f \
+    -name '*_raw.mp4.part*.mp4' -size 0 -print0 2>/dev/null)
+
+  if [[ "$deleted_bundles" -gt 0 || "$deleted_files" -gt 0 ]]; then
+    log INFO "stale part cleanup result: bundles=${deleted_bundles} files=${deleted_files} bytes=${deleted_bytes}"
+  fi
+}
+
 main() {
   local free_bytes processed bundles
   delete_stale_zero_bundles
+  delete_stale_zero_part_bundles
   free_bytes="$(available_bytes)"
 
   # Protect the disk before cleanup work: once free space is below 3 GiB,