Motor with prepositive brake

The utility model relates to a motor with a prepositive brake. The motor comprises an engine body, a supporting seat, the brake and a belt wheel. The supporting seat is fixedly connected to a front end of the engine body. A front end of the supporting seat is provided with a bearing cap. A rear end of the engine body is provided with a rear end cover. The engine body comprises a shell, a stator, a rotor and a main shaft. The main shaft penetrates the engine body and the supporting seat. A bearing is arranged between an outer wall of the main shaft and an inner wall of the supporting seat. The main shaft is located on a central section of a supporting seat segment and is provided with a brake wheel through flat key connection. The supporting seat is in a cuboid shape. A bottom of the supporting seat is provided with a connection sheet with a plurality of bolt holes. The brake is fixedly arranged on any one side wall of the supporting seat. The brake is placed on the supporting seat of the front end and the sup