The present invention relates to the technical field of motors, and discloses an electric car motor controller assembly with a safety alarm function. The assembly comprises a main body box, a motor box is fixedly installed at the inner bottom wall of the internal portion of the main body box, a first motor is fixedly installed at the inner bottom wall of the motor box, an output shaft of the firstmotor is fixedly connected with a movable block, left and right sides of the movable block are fixedly connected with fan blades, the bottom portion of the main body box is provided with a first through hole which communicates with the main body box, a filter net is fixedly installed at a position at the bottom portion of the main body box and corresponding to the first through hole, damping boxes are fixedly connected with the inner bottom wall of the main body box and located at the left and right sides of the motor box, the top portions of the damping boxes are provided with open holes, and springs are fixedly installed at the inner bottom walls of the damping boxes.