The utility model provides a cleaning device for motor case, relates to motor processing production technical field, its characterized in that: including the bracing piece, there is the gyro wheel bracing piece below through screwed connection, and the bracing piece top is equipped with the control box, is equipped with the door that opens and shuts on the control box, is equipped with the observation window on the door that opens and shuts, be equipped with the connecting rod in the control box, be equipped with the clip below the connecting rod, the connecting rod passes through the dead lever and connects on the control box inner wall, the control box lower extreme is equipped with the delivery port, is equipped with the closing cap on the delivery port, and the control box top is equipped with the water inlet, is equipped with the spray thrower on the control box inner wall, and the feed water valve all is connected through the connecting pipe with the spray thrower to the water inlet, and the control box is equipped with the controller outward, and just controlled connecting rod, spray thrower are connected to the controller. The utility model discloses rational in infrastructure, convenient operation, use are convenient.