diff --git a/main.py b/main.py
index 34e3dc7..c63cef3 100644
--- a/main.py
+++ b/main.py
@@ -17,6 +17,7 @@ was launched or whether the venv already has ``src`` on its path.
 from __future__ import annotations
 
 import argparse
+import logging
 import os
 import sys
 
@@ -27,9 +28,10 @@ from sync.config import load_config
 from sync.logging_setup import setup_logging
 from sync.fullsync import full_sync
 from sync import service
-from sync.compare import compare, any_mismatch, format_report
+from sync.compare import compare, any_mismatch, format_report, write_report
 
 CONFIG_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "config.yaml")
+log = logging.getLogger("main")
 
 
 def _parse_args(argv):
@@ -99,11 +101,14 @@ def main(argv=None) -> int:
     if args.command == "compare":
         results = compare(cfg, granularity=args.granularity,
                           db_filter=args.db, table_filter=args.table)
-        report = format_report(results, args.granularity)
-        print(report)
-        if args.report:
-            with open(args.report, "w", encoding="utf-8") as f:
-                f.write(report + "\n")
+        # Persist the report as a dated log file under the logging directory
+        # (logs/ by default); --report still allows an extra custom path.
+        log_dir = os.path.dirname((cfg.logging or {}).get("path", "sync.log")) or "."
+        written = write_report(results, args.granularity, log_dir=log_dir,
+                               extra_path=args.report)
+        print(format_report(results, args.granularity))
+        log.info("compare finished (granularity=%s) report=%s mismatch=%s",
+                 args.granularity, written, any_mismatch(results))
         return 1 if any_mismatch(results) else 0
 
     return 2  # unreachable: argparse requires a subcommand
diff --git a/run_compare_ids.cmd b/run_compare_ids.cmd
new file mode 100644
index 0000000..cbfa530
--- /dev/null
+++ b/run_compare_ids.cmd
@@ -0,0 +1,3 @@
+@echo off
+cd /d C:\Users\peng\Projects\ProductionDataBaseSync_DataMacro
+.venv\Scripts\python.exe main.py compare --granularity ids >> logs\compare_task_stdout.log 2>&1
diff --git a/src/sync/compare.py b/src/sync/compare.py
index 75c5b0c..83ff563 100644
--- a/src/sync/compare.py
+++ b/src/sync/compare.py
@@ -11,7 +11,9 @@ as full sync -- empirically confirming the two stay aligned.
 """
 from __future__ import annotations
 
+import datetime as _dt
 import logging
+import os
 from dataclasses import dataclass, field
 
 from .config import FileMapping, SyncConfig
@@ -139,3 +141,52 @@ def format_report(results: list[TableResult], granularity: str = "count") -> str
         else:
             lines.append(f"{base}  access={r.access_count} sql={r.sql_count} [{r.status.upper()}]")
     return "\n".join(lines)
+
+
+def summarize(results: list[TableResult]) -> dict:
+    """Tally the outcome buckets: match / mismatch / skipped / error."""
+    s = {"match": 0, "mismatch": 0, "skipped": 0, "error": 0}
+    for r in results:
+        s[r.status] = s.get(r.status, 0) + 1
+    return s
+
+
+def write_report(results: list[TableResult], granularity: str = "count",
+                 log_dir: str = ".", run_dt: _dt.datetime | None = None,
+                 extra_path: str | None = None) -> str:
+    """Render the full report and persist it as a dated log file under *log_dir*.
+
+    Always writes ``<log_dir>/compare_<granularity>_<YYYY-MM-DD>.log``,
+    overwriting the day's previous run (one report per day; the logging system's
+    per-day archival later moves yesterday's file into ``logs/Archive/``). When
+    *extra_path* is given (the ``--report`` CLI option) the identical content is
+    also written there for backward compatibility. Returns the primary log path.
+    """
+    run_dt = run_dt or _dt.datetime.now()
+    stats = summarize(results)
+    body = format_report(results, granularity)
+    header = (
+        "============================================================\n"
+        " 数据一致性核对报告 / Compare Report\n"
+        f" 生成时间   : {run_dt.strftime('%Y-%m-%d %H:%M:%S')}\n"
+        f" 粒度       : {granularity}\n"
+        f" 比对表合计 : {stats['match'] + stats['mismatch']}\n"
+        f" 一致 MATCH : {stats['match']}\n"
+        f" 不一致 MISMATCH : {stats['mismatch']}\n"
+        f" 跳过 SKIPPED : {stats['skipped']}\n"
+        f" 错误 ERROR : {stats['error']}\n"
+        "============================================================\n"
+    )
+    report = header + body + "\n"
+
+    log_dir = log_dir or "."
+    os.makedirs(log_dir, exist_ok=True)
+    primary = os.path.join(
+        log_dir, f"compare_{granularity}_{run_dt.strftime('%Y-%m-%d')}.log"
+    )
+    with open(primary, "w", encoding="utf-8") as f:
+        f.write(report)
+    if extra_path:
+        with open(extra_path, "w", encoding="utf-8") as f:
+            f.write(report)
+    return primary