The products are applied to lower limb rehabilitation after operation. The successful develop of this device solved the question that the existing rehabilitation brace doesn’t have the security measures and the patient aren’t able to control the strength of lower limb training. the existing rehabilitation brace doesn’t have enough strength so that it Can not achieve the effective role in stimulating bone growth,; however, excessive force will result in negative damage, which affects bone healing. Doctors use the device according to the specific circumstances of fracture patients, through computer personalize set the security value, the patients can bold stampede in the rehabilitation process, When the stampede force reached the doctors preset value, the special equipment, alarm, and suggesting that patients reduce the stampede force until the alarm strop. In the regulation of pressure within safe limits, the patient in the protection of monitoring devices being effective rehabilitation, and greatly improving the lower limb rehabilitation of patients after operation.