In order to improve the service performance of mobile cloud computing, the paper strategy launched a study about switching strategy of mobile cloud computing, we propose a fused mobile cloud computing switching method based on threshold judgment and network selection .This method divided the switching strategy of mobile cloud computing process into two steps, first by a threshold judgment to determine whether to switch, followed by the use of multi-attribute decision making method to select the best candidate network for the switching .Experimental results show that the proposed switching method has more excellent switching performance than Saw method and TOPSIS method, at the three indicators of switching frequency, completion time, the energy consumption of the mobile terminal have shown outstanding advantages.