Impairment of the extensor mechanism secondary to total knee arthroplasty is a rare but devastating complication. Transfem- oral amputation is considered to be the last choice for failed knee arthroplasty, which seriously affects the quality of patient's life. At pres- ent, there is a variety of treatment methods, which has not been systematically evaluated. Therefore, this article summarizes the related origi- nal articles on the treatment of extensor mechanism disruption after total knee arthroplasty, involving the current researches on the injury mechanism, concrete treatment plan, and related complications, to provide a reference for clinicians who will deal with knee extensor dis- ruption.