With the increasing of transportation demand,the traffic congestion is rising, the state of oversaturated intersection become more and more frequent, and the economic loss are also more and more serious.In view of this situation,The paper introduces the idea of the interative learning and fuzzy logic to design traffic signal controller.According to the concept of queue length balanced controlling,this control stategy can handle the uncertainty by fuzzy logic, also can adapt itself to the changing traffic flow by interative learning,and achieve the equilibrium of queue length and make full use of green time at last. The simulation results show the effectiveness of this method.