The utility model discloses a mechanical engineering operation car, comprising a base plate, the top fixedly connected with riser of bottom plate, the top fixedly connected with top frame of riser, the bottom fixedly connected with mobile device of top frame inner wall, one side fixedly connected with movable plate of mobile device, one side of movable plate is fixed and is connected with the carriage release lever, and the one end of carriage release lever runs through the outside that a frame just extended to a frame, and the carriage release lever is located the outside one end rotation ofa frame and is connected with damaged roller, the surperficial first motor of top fixedly connected with of carriage release lever, the utility model relates to a mechanical engineering technical field. This mechanical engineering operation car has reached and has been convenient for carry out broken purpose to the material, improves crushing effect, increases crushing speed, and the people's of being convenient for use need not artifical the removal, has lightened workman's burden, has guaranteed the stability of device, just has pair material to collect, is convenient for control the ejection of compact of material simultaneously, increases the practicality of device.