Abstract: Objective: To investigate the curative effects of double-sided cone spiral mortar Zweymüller combined with PLUS-SL micro-invasive handle in the treatment of femoral head necrosis complicated with secondary osteoarthritis.Methods: Fifty-eight hips(50 cases) with femoral head necrosis complicated with secondary osteoarthritis were treated with double-sided cone spiral mortar Zweymüller combined with PLUS-SL micro-invasive handle.All acetabulums were lined with high cross linking polyethylene dislocation and ceramic ball head.All patients were followed up for 10 to 32 months.Results: The postoperative pain disappeared in all patients.The difference of the lengths of both legs was(1.2±0.51) cm,the postoperative Harris score was significantly higher than that of before operation(P<0.01).Conclusions: The treatment of femoral head necrosis complicated with secondary osteoarthritis with double-sided cone spiral mortar Zweymüller combined with PLUS-SL micro-invasive handle can improve the recovery of the joint function.