diff --git a/electron/services/accountDirResolver.ts b/electron/services/accountDirResolver.ts
new file mode 100644
index 0000000..1ad8c7a
--- /dev/null
+++ b/electron/services/accountDirResolver.ts
@@ -0,0 +1,73 @@
+import { existsSync, readdirSync, statSync } from 'fs'
+import { join } from 'path'
+
+const accountDirCache = new Map<string, string>()
+
+const cleanAccountDirName = (dirName: string): string => {
+  const trimmed = dirName.trim()
+  if (!trimmed) return trimmed
+
+  if (trimmed.toLowerCase().startsWith('wxid_')) {
+    const match = trimmed.match(/^(wxid_[^_]+)/i)
+    if (match) return match[1]
+    return trimmed
+  }
+
+  const suffixMatch = trimmed.match(/^(.+)_([a-zA-Z0-9]{4})$/)
+  if (suffixMatch) return suffixMatch[1]
+
+  return trimmed
+}
+
+const isDirectory = (path: string): boolean => {
+  try {
+    return statSync(path).isDirectory()
+  } catch {
+    return false
+  }
+}
+
+export const resolveAccountDir = (dbPath?: string, wxid?: string): string | null => {
+  if (!dbPath || !wxid) return null
+
+  const cleanedWxid = cleanAccountDirName(wxid)
+  const normalized = dbPath.replace(/[\\/]+$/, '')
+  const cacheKey = `${normalized}|${cleanedWxid.toLowerCase()}`
+
+  const cached = accountDirCache.get(cacheKey)
+  if (cached && existsSync(cached)) return cached
+  if (cached && !existsSync(cached)) {
+    accountDirCache.delete(cacheKey)
+  }
+
+  const lowerWxid = cleanedWxid.toLowerCase()
+  if (!lowerWxid.startsWith('wxid_')) {
+    const direct = join(normalized, cleanedWxid)
+    if (existsSync(direct) && isDirectory(direct)) {
+      accountDirCache.set(cacheKey, direct)
+      return direct
+    }
+  }
+
+  try {
+    const entries = readdirSync(normalized)
+    for (const entry of entries) {
+      const entryPath = join(normalized, entry)
+      if (!isDirectory(entryPath)) continue
+
+      const lowerEntry = entry.toLowerCase()
+      const isExactMatch = lowerEntry === lowerWxid
+      const isSuffixMatch = lowerEntry.startsWith(`${lowerWxid}_`)
+      const shouldMatch = lowerWxid.startsWith('wxid_')
+        ? isSuffixMatch
+        : (isExactMatch || isSuffixMatch)
+
+      if (shouldMatch) {
+        accountDirCache.set(cacheKey, entryPath)
+        return entryPath
+      }
+    }
+  } catch { }
+
+  return null
+}
diff --git a/electron/services/annualReportService.ts b/electron/services/annualReportService.ts
index bf56492..04faedf 100644
--- a/electron/services/annualReportService.ts
+++ b/electron/services/annualReportService.ts
@@ -1,6 +1,6 @@
 import { parentPort } from 'worker_threads'
 import { wcdbService } from './wcdbService'
-import { ConfigService } from './config'
+import { resolveAccountDir } from './accountDirResolver'
 
 export interface TopContact {
   username: string
@@ -159,8 +159,7 @@ class AnnualReportService {
     if (!dbPath) return { success: false, error: '未配置数据库路径' }
     if (!decryptKey) return { success: false, error: '未配置解密密钥' }
 
-    const configService = ConfigService.getInstance()
-    const accountDir = configService.getAccountDir(dbPath, wxid)
+    const accountDir = resolveAccountDir(dbPath, wxid)
     if (!accountDir) return { success: false, error: '未找到账号目录' }
 
     const ok = await wcdbService.open(accountDir, decryptKey)
diff --git a/electron/services/dualReportService.ts b/electron/services/dualReportService.ts
index 07a6d4a..1d8de7b 100644
--- a/electron/services/dualReportService.ts
+++ b/electron/services/dualReportService.ts
@@ -1,6 +1,6 @@
 import { parentPort } from 'worker_threads'
 import { wcdbService } from './wcdbService'
-import { ConfigService } from './config'
+import { resolveAccountDir } from './accountDirResolver'
 
 
 export interface DualReportMessage {
@@ -110,8 +110,7 @@ class DualReportService {
     if (!dbPath) return { success: false, error: '未配置数据库路径' }
     if (!decryptKey) return { success: false, error: '未配置解密密钥' }
 
-    const configService = ConfigService.getInstance()
-    const accountDir = configService.getAccountDir(dbPath, wxid)
+    const accountDir = resolveAccountDir(dbPath, wxid)
     if (!accountDir) return { success: false, error: '无法找到账号目录' }
     const ok = await wcdbService.open(accountDir, decryptKey)
     if (!ok) return { success: false, error: 'WCDB 打开失败' }