Abstract: Objective To analyze the gait characteristics of hip amputees, and analyze the reasons for their differences from normal gait, assist clinical diagnosis and evaluation, and provide experimental basis and theoretical analysis for the design of mechanical structure and control system of new hip prostheses. Methods Through the portable human motion capture device and plantar pressure analysis system, the kinematics and plantar pressure information of 5 hip amputees were collected, and compared with 15 healthy volunteers in the control group, the amputees were compared with normal people and amputees. Gait difference between the affected side and the healthy side. Results The gait of hip amputees is significantly different from that of normal people. The proportion of the double support period is higher than that of the normal gait, the step length of the affected side and the uninfected side, step time, loading response period, mid support period, pre-swing period, Compared with the control group, the proportion of the swing period was significantly different (P<0.05). The relative symmetry index of the gait is (0.60±0.05). Compared with the affected side, the support period of the healthy side is extended, the step length is shortened, the ground support reaction force is greater than that of the affected side, and the center of pressure trajectory shifts to the affected side. Conclusion Hip amputees have weak walking ability, poor gait symmetry, lack of continuity in the body's center of gravity.