diff --git a/src/service/project.ts b/src/service/project.ts
index 3084951..39739ad 100644
--- a/src/service/project.ts
+++ b/src/service/project.ts
@@ -43,6 +43,16 @@ export function calcUncompactedArea(totalArea?: number, compactedArea?: number)
   return Math.max(0, (totalArea ?? 0) - (compactedArea ?? 0))
 }
 
+function escapeValue(value: any): string {
+  if (value === null || value === undefined)
+    return 'NULL'
+  if (typeof value === 'number')
+    return String(value)
+  if (typeof value === 'boolean')
+    return value ? '1' : '0'
+  return `'${String(value).replace(/'/g, '\'\'')}'`
+}
+
 /** 查询全部项目 */
 export async function selectAll(): Promise<Project[]> {
   return DB.select(TABLE)
@@ -68,7 +78,7 @@ export async function insert(data: Omit<Project, 'id'>): Promise<number> {
   return result?.[0]?.id || 0
 }
 
-/** 更新项目 */
+/** 更新项目；标记为已完成(status=1)时清除该项目的作业记录与 RTK 轨迹 */
 export async function update(id: number, data: Partial<Project>): Promise<any> {
   const old = await selectById(id)
   const totalArea = data.total_area !== undefined ? data.total_area : old?.total_area
@@ -76,11 +86,24 @@ export async function update(id: number, data: Partial<Project>): Promise<any> {
     ? data.total_compaction_area
     : old?.total_compaction_area
 
-  return DB.update(TABLE, {
+  const payload: Record<string, any> = {
     ...data,
     uncompacted_area: calcUncompactedArea(totalArea, compactedArea),
     updated_at: new Date().toISOString(),
-  }, `id = ${id}`)
+  }
+
+  const becomingCompleted = data.status === 1 && old?.status !== 1
+  if (becomingCompleted) {
+    const sets = Object.keys(payload).map(k => `${k} = ${escapeValue(payload[k])}`)
+    await DB.transaction([
+      `UPDATE ${TABLE} SET ${sets.join(', ')} WHERE id = ${id}`,
+      `DELETE FROM rtk_track WHERE work_record_id IN (SELECT id FROM work_record WHERE project_id = ${id})`,
+      `DELETE FROM work_record WHERE project_id = ${id}`,
+    ])
+    return
+  }
+
+  return DB.update(TABLE, payload, `id = ${id}`)
 }
 
 /** 删除项目 */
diff --git a/src/utils/sqlite.ts b/src/utils/sqlite.ts
index 34f89e5..1e8943a 100644
--- a/src/utils/sqlite.ts
+++ b/src/utils/sqlite.ts
@@ -115,7 +115,7 @@ class DB {
   /**
    * 执行 SQL 语句（增、删、改）
    */
-  static executeSql(sql: string | string[]): Promise<any> {
+  static executeSql(sql: string[]): Promise<any> {
     return DB.open().then(() => {
       return new Promise((resolve, reject) => {
         plus.sqlite.executeSql({