diff --git a/crates/erp-core/src/lib.rs b/crates/erp-core/src/lib.rs
index b4c2a50..0900174 100644
--- a/crates/erp-core/src/lib.rs
+++ b/crates/erp-core/src/lib.rs
@@ -8,4 +8,4 @@ pub mod rbac;
 pub mod types;
 
 // 便捷导出
-pub use module::{ModuleContext, ModuleType};
+pub use module::{ModuleContext, ModuleType, PermissionDescriptor};
diff --git a/crates/erp-core/src/module.rs b/crates/erp-core/src/module.rs
index 98239e7..15e9241 100644
--- a/crates/erp-core/src/module.rs
+++ b/crates/erp-core/src/module.rs
@@ -7,6 +7,22 @@ use uuid::Uuid;
 use crate::error::{AppError, AppResult};
 use crate::events::EventBus;
 
+/// 权限描述符，用于模块声明自己需要的权限。
+///
+/// 各业务模块通过 `ErpModule::permissions()` 返回此列表，
+/// 由 erp-server 在启动时统一注册到权限表。
+#[derive(Clone, Debug)]
+pub struct PermissionDescriptor {
+    /// 权限编码，全局唯一，格式建议 `{模块}.{动作}` 如 `plugin.admin`
+    pub code: String,
+    /// 权限显示名称
+    pub name: String,
+    /// 权限描述
+    pub description: String,
+    /// 所属模块名称
+    pub module: String,
+}
+
 /// 模块类型
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum ModuleType {
@@ -90,6 +106,13 @@ pub trait ErpModule: Send + Sync {
         Ok(())
     }
 
+    /// 返回此模块需要注册的权限列表。
+    ///
+    /// 默认返回空列表，有权限需求的模块（如 plugin）可覆写此方法。
+    fn permissions(&self) -> Vec<PermissionDescriptor> {
+        vec![]
+    }
+
     /// Downcast support: return `self` as `&dyn Any` for concrete type access.
     ///
     /// This allows the server crate to retrieve module-specific methods
diff --git a/crates/erp-plugin/src/service.rs b/crates/erp-plugin/src/service.rs
index eb4c8ee..ee00b34 100644
--- a/crates/erp-plugin/src/service.rs
+++ b/crates/erp-plugin/src/service.rs
@@ -1,5 +1,5 @@
 use chrono::Utc;
-use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, PaginatorTrait, QueryFilter, Set};
+use sea_orm::{ActiveModelTrait, ColumnTrait, ConnectionTrait, EntityTrait, PaginatorTrait, QueryFilter, Set};
 use uuid::Uuid;
 use sha2::{Sha256, Digest};
 
@@ -76,7 +76,7 @@ impl PluginService {
         Ok(plugin_model_to_resp(&model, &manifest, vec![]))
     }
 
-    /// 安装插件: 创建动态表 + 注册 entity 记录 + 注册事件订阅 + status=installed
+    /// 安装插件: 创建动态表 + 注册 entity 记录 + 注册事件订阅 + 注册权限 + status=installed
     pub async fn install(
         plugin_id: Uuid,
         tenant_id: Uuid,
@@ -142,6 +142,19 @@ impl PluginService {
             }
         }
 
+        // 注册插件声明的权限到 permissions 表
+        if let Some(perms) = &manifest.permissions {
+            register_plugin_permissions(
+                db,
+                tenant_id,
+                operator_id,
+                &manifest.metadata.id,
+                perms,
+                &now,
+            )
+            .await?;
+        }
+
         // 加载到内存
         engine
             .load(
@@ -236,7 +249,7 @@ impl PluginService {
         Ok(plugin_model_to_resp(&model, &manifest, entity_resps))
     }
 
-    /// 卸载插件: unload + 有条件地 drop 动态表 + status=uninstalled
+    /// 卸载插件: unload + 有条件地 drop 动态表 + 清理权限 + status=uninstalled
     pub async fn uninstall(
         plugin_id: Uuid,
         tenant_id: Uuid,
@@ -294,6 +307,9 @@ impl PluginService {
             }
         }
 
+        // 清理此插件注册的权限
+        unregister_plugin_permissions(db, tenant_id, &manifest.metadata.id).await?;
+
         let mut active: plugin::ActiveModel = model.into();
         active.status = Set("uninstalled".to_string());
         active.updated_at = Set(now);
@@ -553,3 +569,146 @@ fn plugin_model_to_resp(
         record_version: model.version,
     }
 }
+
+/// 将插件声明的权限注册到 permissions 表。
+///
+/// 使用 raw SQL 避免依赖 erp-auth 的 entity 类型。
+/// 权限码格式：`{plugin_manifest_id}.{code}`（如 `erp-crm.customer.list`）。
+/// 使用 `ON CONFLICT DO NOTHING` 保证幂等。
+async fn register_plugin_permissions(
+    db: &sea_orm::DatabaseConnection,
+    tenant_id: Uuid,
+    operator_id: Uuid,
+    plugin_manifest_id: &str,
+    perms: &[crate::manifest::PluginPermission],
+    now: &chrono::DateTime<chrono::Utc>,
+) -> AppResult<()> {
+    for perm in perms {
+        let full_code = format!("{}.{}", plugin_manifest_id, perm.code);
+        // resource 使用插件 manifest id，action 使用权限的 code 字段
+        let resource = plugin_manifest_id.to_string();
+        let action = perm.code.clone();
+        let description_sql = if perm.description.is_empty() {
+            "NULL".to_string()
+        } else {
+            format!("'{}'", perm.description.replace('\'', "''"))
+        };
+
+        let sql = format!(
+            r#"
+            INSERT INTO permissions (id, tenant_id, code, name, resource, action, description, created_at, updated_at, created_by, updated_by, deleted_at, version)
+            VALUES (gen_random_uuid(), '{tenant_id}', '{full_code}', '{name}', '{resource}', '{action}', {desc}, '{now}', '{now}', '{operator_id}', '{operator_id}', NULL, 1)
+            ON CONFLICT (tenant_id, code) WHERE deleted_at IS NULL DO NOTHING
+            "#,
+            tenant_id = tenant_id,
+            full_code = full_code.replace('\'', "''"),
+            name = perm.name.replace('\'', "''"),
+            resource = resource.replace('\'', "''"),
+            action = action.replace('\'', "''"),
+            desc = description_sql,
+            now = now.to_rfc3339(),
+            operator_id = operator_id,
+        );
+
+        db.execute(sea_orm::Statement::from_string(
+            sea_orm::DatabaseBackend::Postgres,
+            sql,
+        ))
+        .await
+        .map_err(|e| {
+            tracing::error!(
+                plugin = plugin_manifest_id,
+                permission = %full_code,
+                error = %e,
+                "注册插件权限失败"
+            );
+            PluginError::DatabaseError(format!("注册插件权限 {} 失败: {}", full_code, e))
+        })?;
+    }
+
+    tracing::info!(
+        plugin = plugin_manifest_id,
+        count = perms.len(),
+        tenant_id = %tenant_id,
+        "插件权限注册完成"
+    );
+    Ok(())
+}
+
+/// 清理插件注册的权限（软删除）。
+///
+/// 使用 raw SQL 按前缀匹配清理：`{plugin_manifest_id}.%`。
+/// 同时清理 role_permissions 中对这些权限的关联。
+async fn unregister_plugin_permissions(
+    db: &sea_orm::DatabaseConnection,
+    tenant_id: Uuid,
+    plugin_manifest_id: &str,
+) -> AppResult<()> {
+    let prefix = format!("{}.%", plugin_manifest_id);
+    let now = chrono::Utc::now().to_rfc3339();
+
+    // 先软删除 role_permissions 中的关联
+    let rp_sql = format!(
+        r#"
+        UPDATE role_permissions
+        SET deleted_at = '{now}', updated_at = '{now}'
+        WHERE permission_id IN (
+            SELECT id FROM permissions
+            WHERE tenant_id = '{tenant_id}'
+              AND code LIKE '{prefix}'
+              AND deleted_at IS NULL
+        )
+        AND deleted_at IS NULL
+        "#,
+        now = now,
+        tenant_id = tenant_id,
+        prefix = prefix.replace('\'', "''"),
+    );
+    db.execute(sea_orm::Statement::from_string(
+        sea_orm::DatabaseBackend::Postgres,
+        rp_sql,
+    ))
+    .await
+    .map_err(|e| {
+        tracing::error!(
+            plugin = plugin_manifest_id,
+            error = %e,
+            "清理插件权限角色关联失败"
+        );
+        PluginError::DatabaseError(format!("清理插件权限角色关联失败: {}", e))
+    })?;
+
+    // 再软删除 permissions
+    let perm_sql = format!(
+        r#"
+        UPDATE permissions
+        SET deleted_at = '{now}', updated_at = '{now}'
+        WHERE tenant_id = '{tenant_id}'
+          AND code LIKE '{prefix}'
+          AND deleted_at IS NULL
+        "#,
+        now = now,
+        tenant_id = tenant_id,
+        prefix = prefix.replace('\'', "''"),
+    );
+    db.execute(sea_orm::Statement::from_string(
+        sea_orm::DatabaseBackend::Postgres,
+        perm_sql,
+    ))
+    .await
+    .map_err(|e| {
+        tracing::error!(
+            plugin = plugin_manifest_id,
+            error = %e,
+            "清理插件权限失败"
+        );
+        PluginError::DatabaseError(format!("清理插件权限失败: {}", e))
+    })?;
+
+    tracing::info!(
+        plugin = plugin_manifest_id,
+        tenant_id = %tenant_id,
+        "插件权限清理完成"
+    );
+    Ok(())
+}