The invention aims to provides a shaft end type torque loader, which comprises a collecting ring, a reducer, an input shaft, an output shaft, a drive motor, a base, a bearing bracket arranged outside the input shaft, an output shaft sleeve arranged outside the output shaft, an output shaft end bearing bracket arranged outside the output shaft sleeve, a harmonic reducer shell fixed outside a harmonic reducer and a planetary gear train reducer shell fixed outside a planetary gear train reducer. The collecting ring is sleeved on the input shaft. The input shaft is connected with the drive motor. One end of the harmonic reducer is connected with the drive motor, while the other end thereof is connected with the planetary gear train reducer. The planetary gear train reducer is also connected with the output shaft. Both the bearing bracket and the output shaft end bearing bracket are fixed on the base. The shaft end type torque loader can change the size and the direction of a torque at the closed end, can stably maintain a torque value at the closed end, and has an unlimited travel angle of the loading motion, capability of amplifying physical factors as well as small energy consumption and low vibration and noise in the operating process.