The invention discloses a servo motor logistics roller. The servo motor logistics roller comprises a roller, a motor casing, a main shaft, magnetic steel and an iron core, wherein the magnetic steel is arranged on the inner wall of the motor shell, the iron core sleeves the main shaft and is fixedly connected with the main shaft, the roller sleeves the motor shell and is fixedly connected with themotor shell, the front end of the motor shell is connected with a front end cover, a middle end cover is arranged at the rear end of the motor shell, a rear end cover is fixed at the rear end of theroller, the main shaft penetrates through a cavity of the motor shell, the front end of the main shaft is supported on the front end cover through a bearing, the rear end of the main shaft is supported on the middle end cover through a bearing, and an auxiliary shaft is supported on the rear end cover through a bearing. According to the servo motor logistics roller, an encoder can be convenientlyinstalled inside the servo motor logistics roller, so that the servo motor logistics roller is simple in structure, convenient to assemble, and complete in function, and remarkably reduces the cost.