Movable low-limbs traction fixing support

The utility model discloses a movable lower limb traction fixing support which comprises an upper bed body, a lower seat, a bracket oscillating arm and a pair of bevel gears. The utility model adopts a movable rectangular frame structure and utilizes the instability principle of the parallelogram to realize the relative motion between the upper bed body and the lower seat by means of eight movable joints among the upper bed body, the lower seat and the bracket oscillating arm. The movement process of the utility model drives a driven gear and a helical connecting rod to rotate by shaking a driving gear, the angle between the bracket oscillating arm and the lower seat can be changed from 30 DEG to 120 DEG, and thus the utility model can achieve the purpose of freely moving the knee joint in the process of traction treatment.