diff --git a/fish/completions/ff.fish b/fish/completions/ff.fish
index 1befd7d..cd7b61f 100644
--- a/fish/completions/ff.fish
+++ b/fish/completions/ff.fish
@@ -1,6 +1,6 @@
 # Completions for ff command
 complete -c ff -f
-set -l ff_subcommands reload edit fish dotfile pon poff pst make script s update help region ssh init copy help region
+set -l ff_subcommands reload edit fish dotfile pon poff pst make script s update help region ssh init copy dirsize help region
 complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "reload" -d "Reload fish configuration"
 complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "edit" -d "Edit custom fish configuration"
 complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "fish" -d "Change to fish config directory"
@@ -14,6 +14,14 @@ complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "help" -d
 
 complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "region" -d "Toggle or set CN_REGION (mirror/proxy region)"
 complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "ssh" -d "SSH init (keys + config.d) or copy config to remote"
+complete -c ff -n "not __fish_seen_subcommand_from $ff_subcommands" -a "dirsize" -d "Show directory sizes"
+
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -s a -l all -d "Recursively show all subdirectories"
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -s d -l depth -d "Recursion depth (default 1)" -r
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -s n -l top -d "Show top N only" -r
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -s r -l reverse -d "Sort smallest first"
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -s h -l help -d "Show help"
+complete -c ff -n "__fish_seen_subcommand_from dirsize" -a "(__fish_complete_directories)" -d "Directory"
 
 complete -c ff -n "__fish_seen_subcommand_from ssh; and not __fish_seen_subcommand_from init copy help" -a init -d "Ensure SSH key and config.d Include"
 complete -c ff -n "__fish_seen_subcommand_from ssh; and not __fish_seen_subcommand_from init copy help" -a copy -d "Copy specified SSH config file(s) to remote"
diff --git a/fish/functions/ff.fish b/fish/functions/ff.fish
index a6b5353..2eef722 100644
--- a/fish/functions/ff.fish
+++ b/fish/functions/ff.fish
@@ -14,6 +14,7 @@ function ff
         "update|Update dotfile" \
         "region|Toggle or set CN_REGION (mirror/proxy region)" \
         "ssh|SSH init (keys + config.d) or copy config to remote" \
+        "dirsize|Show directory sizes (du wrapper)" \
         "help|Show this help message"
 
     # 确保 execute-script 可用（在 fish 自动加载前手动引入一次）
@@ -89,6 +90,14 @@ function ff
                 source ~/.dotfile/fish/functions/ff-ssh.fish
             end
             ff_ssh $argv[2..-1]
+        case dirsize
+            set -l script_path ~/.dotfile/script/dirsize.sh
+            if test -f $script_path
+                bash $script_path $argv[2..-1]
+            else
+                echo "Error: dirsize script not found at $script_path"
+                return 1
+            end
         case region
             set -l sub toggle
             if test (count $argv) -ge 2
diff --git a/script/dirsize.sh b/script/dirsize.sh
index 73a59c1..c5ecc78 100755
--- a/script/dirsize.sh
+++ b/script/dirsize.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -euo pipefail
+set -eu
 
 usage() {
     cat <<'EOF'
@@ -33,13 +33,31 @@ TARGET_DIR="."
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
-        -a|--all)    ALL=true; shift ;;
-        -d|--depth)  DEPTH="$2"; shift 2 ;;
-        -n|--top)    TOP="$2"; shift 2 ;;
-        -r|--reverse) REVERSE=true; shift ;;
-        -h|--help)   usage ;;
-        -*)          echo "未知选项: $1" >&2; usage ;;
-        *)           TARGET_DIR="$1"; shift ;;
+    -a | --all)
+        ALL=true
+        shift
+        ;;
+    -d | --depth)
+        DEPTH="$2"
+        shift 2
+        ;;
+    -n | --top)
+        TOP="$2"
+        shift 2
+        ;;
+    -r | --reverse)
+        REVERSE=true
+        shift
+        ;;
+    -h | --help) usage ;;
+    -*)
+        echo "未知选项: $1" >&2
+        usage
+        ;;
+    *)
+        TARGET_DIR="$1"
+        shift
+        ;;
     esac
 done
 
@@ -48,7 +66,7 @@ if [[ ! -d "$TARGET_DIR" ]]; then
     exit 1
 fi
 
-TARGET_DIR="${TARGET_DIR%/}"
+TARGET_DIR="$(cd "$TARGET_DIR" && pwd -P)"
 
 if $ALL; then
     DEPTH=999
@@ -60,9 +78,9 @@ if $REVERSE; then
 fi
 
 if [[ "$OSTYPE" == "darwin"* ]]; then
-    result=$(du -h -d "$DEPTH" "$TARGET_DIR" 2>/dev/null | grep -v "^.*${TARGET_DIR}$" | sort $sort_flag)
+    result=$(sudo du -h -d "$DEPTH" "$TARGET_DIR" 2>/dev/null | awk -v dir="$TARGET_DIR" '$2 != dir {print}' | sort $sort_flag)
 else
-    result=$(du -h --max-depth="$DEPTH" "$TARGET_DIR" 2>/dev/null | grep -v "^.*${TARGET_DIR}$" | sort $sort_flag)
+    result=$(sudo du -h --max-depth="$DEPTH" "$TARGET_DIR" 2>/dev/null | awk -v dir="$TARGET_DIR" '$2 != dir {print}' | sort $sort_flag)
 fi
 
 if [[ "$TOP" -gt 0 ]]; then