The invention discloses a pipe polishing machine for the pipe outer diameter end surface and relates to the technical field of boiler installation device manufacturing. The pipe polishing machine for the pipe outer diameter end surface comprises a base, a pipe clamp solid device and a support, wherein the pipe clamp solid device is used for clamping a pipe tightly and arranged at one end of the base, and the support is arranged at the other end of the base. One end, close to the pipe clamp solid device, of the base is provided with a protective cover which is provided with a movable pipe limiting angle steel. The upper end of the support is provided with a push switch. A sliding rod is arranged between the pipe clamp solid device and the support. One end of the sliding rod is connected with the pipe clamp solid device, and the other end of the sliding rod is connected with the support. One side, close to the support, of the sliding rod is provided with a smooth casing pipe which is provided with a motor, and one end of the smooth casing pipe is hinged with one end of a handle push-pull rod. A motor shaft is connected with one end of a pipe polishing device. The push switch is connected with the handle push-pull rod through a connecting rod. The pipe polishing machine for the pipe outer diameter end surface can solve the problems that the existing pipe polishing work wastes labor and time and the labor intensity of workers is large.