The invention relates to the technical field of automobiles, and particularly relates to an electric automobile air conditioner compressor drive DC brushless motor. The motor comprises a motor body, a stator assembly, a stator sleeve, a rotor assembly, a motor shaft, and a back cover assembly. The rotor assembly comprises permanent magnet bars, a rotor drum, and a rotor end cover. The permanent magnet bars are ring-shaped, and are fixed to the inner side of the rotor drum. The rotor drum and the rotor end cover are fixedly connected. The rotor end cover is fixedly connected with the motor shaft through a key. The stator sleeve is fixedly connected with a back end cover. The stator assembly is fixed to the stator sleeve. The stator sleeve movably sleeves the motor shaft. The back cover assembly is equipped with a controller inside. The rotor magnet steel of the motor is not easy to fall off, and can be close enough to the stator, so the efficiency of magnetic action is improved. Moreover, the torque is increased, the number of permanent magnets is increased, and the running stability of the rotor is improved. The motor is convenient to install and easy to match, and the sales thereof is promoted.