According to characters of the deep and shallow tectonics in seismic area and the results of field investigation,the meizoseismal region of the Tianzhu-Gulang M_S5.4 earthquake on June 1,1996 is located at the intersection of Gulang fault and Wuwei-Tianzhu fault,the intersection is easy to accumulate and release stress. This earthquake results from the joint action of the active faults.