Due to damage to the hemi-advanced central nervous system of stroke hemiplegic patients, their ability of sit-to-stand transfer is impaired, and they are prone to fall during the sit-to-stand transfer.This article describes the characteristics of sit-to-stand transfer of hemiplegic patients at different foot placement from a biomechanical perspective, discusses the correlation between different features, analyzes the reasons for their fall, and describes the application of sit-to-stand transfer training in postoperative rehabilitation of hemiplegic patients , So as to provide a basis for postoperative rehabilitation of hemiplegic patients.