The invention relates to the field of motors, and in particular relates to a stable motor. The stable motor comprises a stator, a rotor sleeved in the stator and a rotating shaft arranged on the rotor in a penetrating manner, and also comprises a shell and a base which are fit with each other, wherein the shell is sleeved on the stator and provided with vent holes in the shell end face, the base is provided with a locating mounting hole column at the center, a circuit board is erected on the outer side of the base, a draught fan is fixedly arranged on rotating shaft on the outer side of the shell end face, the stator is packaged with a plastic package body, and a circle of plastic package reinforced connecting ring arranged close to the side wall of the shell is integrally connected on the end face of the plastic package body facing the base side. Air flows at the rear end of the circuit board are sent into the motor via vent holes in the circuit board and base plate, in the same way, the air flows between the circuit board and base plate are sent into the motor via the vent holes in the base plate, then absorb heat in the motor, and then are rapidly exported from the motor via vent holes in the inclined reinforced pored groove wall. The whole motor is strong in integrality, compact in structure, convenient to dismount, low in cost, high in strength, good in stability and low in noise.