The utility model discloses a variable frequency motor with water cooled pipes. The variable frequency motor comprises a motor base. The motor base is equipped with a rotating shaft. a motor end cap is arranged at the rotating shaft, far away from one side where the rotating shaft and the motor base are fixed. The motor end cap comprises a sleeve which sleeves the rotating shaft and a cap installation outer ring body which sleeves the sleeve. A bearing is arranged between the sleeve and the rotating shaft. One side, close to the motor base, of the cap installation outer ring body is equipped with a stator support. A stator sleeves the inner side of the stator support. The periphery of the motor base is equipped with a rotor support. A rotor is arranged on the outer side wall of the rotor support. Two side water cooled channels are arranged in the side wall of the sleeve. One side, close to the motor base, of the sleeve is equipped with a bottom water cooled pipe. Two ends of the bottom water cooled pipe are communicated with the side water cooled channels. One end, far away from the communicated place of the side water cooled channel and the bottom water cooled pipe of each side water cooled channel and is arranged to be communicated with outside. Cooling water is introduced into components of the side water cooled channels and the like in the variable frequency motor with water cooled pipes, heat in a motor can be taken away effectively, the temperature of the motor can be lowered effectively, and therefore running of the motor in a normal temperature is ensured and the service life is prolonged.