The active distribution network has a large of distributed generator (DG), therefore, the operation mode and control strategy of the traditional distribution network are not suitable for the active distribution system. The selfhealing control of active distribution network can prevent, diagnose, analyze of the fault and recover power supply. Under this background, a intelligent control terminal is designed for active distribution networks in this paper. Then, the fault isolation, fault phase selection, fault location are designed. Finally, the simulation model is constructed in Matlab/Simulink, and it is shown that the terminal system has a good ability to deal with the fault of active distribution network.