Objective Percutaneous sacroiliac joint screw is an important method for the treatment of pelvic fracture. Due to the complex anatomical structure around the sacroiliac joint,the misplacement of the sacroiliac screw is highly possible to damage the blood vessels and nerves. Surgical robot is more and more used in the operation of percutaneous sacroiliac joint screw because of its high accuracy,good stability and highsafety. At present,however,in robot assisted sacroiliac joint screw surgery,robots can only ...