The utility model discloses a multi -purpose clearance clearance sacrifice device of power maintenance, including automobile body, power drive device, flexible arm, chain saw and walking frame, the automobile body is installed on the walking frame, be equipped with spool and live axle in the walking frame, the power drive device is installed the automobile body, its power take off end is connected on spool and the live axle, flexible arm is installed on the automobile body install at the top of flexible arm the chain saw, the drive end of chain saw pass flexible arm inside with the power take off end of power drive device is connected, still be equipped with an overhead guard on the walking frame. The utility model discloses can conveniently realize cutting the branch to guarantee power equipment and the transmission line safety when the maintenance, can also collect rubbish simultaneously and not lead to the fact the influence to the environment.