Abstract: It was very important to control the risk of human resource management outsourcing by evaluating its efficiency. Compared with traditional methods， the Malmquist index method can assess the change trend of organizatio’s efficiency and its impact factors from dynamic view without the influence of man-made factors. The empirical results showed that the efficiency of the industry of human resource management outsourcing was continuingly improving， but the increasing rate decreased. There were great differences in the level of these firms and their increasing forces. These data can give more support to the decision making for human resource management outsourcing forms.