With the increasing number and running time of high voltage cable, the new challenges of ground state monitoring and fault diagnosis of cross interconnecting high voltage cables network are presented. In order to realize the early warning of the typical ground defects of the high voltage cable including PVC insulation layer breakage,ground wire breakage and the water of the interconnection box, the method of using sheath current at the head and tail of each section of cross interconnecting high voltage cables is proposed to identify and locate the typical ground defect evolution. First, the equivalent circuit model of cross interconnecting high voltage cables network is established. Then, the simulation method of the evolution of the three typical grounding defects and the identify criterion are proposed based on the equivalent model. The three types of defect evolution data can prove that the characteristic value calculated by the sheath circulation can be used to identify and locate the typical ground defect evolution of high voltage cables.