In fast handoff process of WLAN，this paper presents a method to choose goals for keeping the load balancing. The method combines the AP size of spare bandwidth, the signal intensity and the current load ratio of the AP. To all possible adjacency APs, if the AP free bandwidth is less than the bandwidth needed by the mobile terminal, the APs should not be considered. Otherwise, the function is calculated and the AP is chosen with the maximal function value to connect by using the load ratio of adjacency AP and RSSI of the terminal. Simulation results show that the method is better than other methods in the overall performance. They don’t present that a certain AP is overloaded.