The utility model provides a from looks enclosed bus connecting piece, includes two semicircular PI panels, and two semicircular PI panel upper portions, lower parts are all connected aluminium through coupling nut and are closed the tight mechanism of golden lock, and each aluminium closes the tight mechanism of golden lock and includes two semicircular staple bolts, and two semicircular staple bolts pass through locking screw and connect fixedly. All be provided with the screw on semicircular staple bolt, the semicircular PI panel, the screw is waist shape hole. The utility model relates to a from looks enclosed bus connecting piece can not only practice thrift working hour cost, can also move the risk by reduction equipment simultaneously, has better reliability and economic benefits.