diff --git a/.gitignore b/.gitignore
index cdaff23..4b52cb3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ bin/
 *.test
 *.out
 coverage.html
+autoeq/
 
 # Go workspace
 vendor/
diff --git a/scripts/reorganize_csv.sh b/scripts/reorganize_csv.sh
new file mode 100755
index 0000000..bec0e42
--- /dev/null
+++ b/scripts/reorganize_csv.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+# 将 CSV 文件按首字符归档到子目录
+# 用法: bash reorganize_csv.sh /data/project/autoeq/measurements/Eafonyoung/data/in-ear
+# 支持预览模式: bash reorganize_csv.sh --dry-run /data/project/autoeq/measurements/Eafonyoung/data/in-ear
+
+DRY_RUN=false
+if [ "$1" = "--dry-run" ]; then
+    DRY_RUN=true
+    shift
+fi
+
+DIR="$1"
+
+if [ -z "$DIR" ] || [ ! -d "$DIR" ]; then
+    echo "用法: $0 [--dry-run] <目录>"
+    echo "示例: $0 --dry-run /data/project/autoeq/measurements/Eafonyoung/data/in-ear"
+    exit 1
+fi
+
+count=0
+skipped=0
+
+# 强制使用 C locale 确保字符范围正确
+export LC_ALL=C
+
+for csv in "$DIR"/*.csv; do
+    [ -f "$csv" ] || continue
+
+    filename=$(basename "$csv")
+    first_char="${filename:0:1}"
+
+    # 小写字母转大写（使用 tr 确保兼容性）
+    if echo "$first_char" | grep -q '[a-z]'; then
+        subdir=$(echo "$first_char" | tr 'a-z' 'A-Z')
+    else
+        subdir="$first_char"
+    fi
+
+    target_dir="$DIR/$subdir"
+    target_path="$target_dir/$filename"
+
+    # 已经在正确位置的跳过
+    if [ -d "$target_dir" ] && [ "$csv" -ef "$target_path" ]; then
+        skipped=$((skipped + 1))
+        continue
+    fi
+
+    if [ "$DRY_RUN" = true ]; then
+        echo "[预览] $filename -> $subdir/$filename"
+    else
+        mkdir -p "$target_dir"
+        mv "$csv" "$target_path"
+        echo "[移动] $filename -> $subdir/$filename"
+    fi
+
+    count=$((count + 1))
+done
+
+if [ "$DRY_RUN" = true ]; then
+    echo "--- 预览完成，共 $count 个文件待移动，$skipped 个已跳过 ---"
+else
+    echo "--- 完成，共移动 $count 个文件，$skipped 个已跳过 ---"
+fi