The Jiaodong peninsula has the highest concentration of gold mines in China. The Jiaojia gold belt is one of the three most important gold belts in the Jiaodong peninsula. In this belt, super gold deposits such as Xincheng, Jiaojia and Hexi have been discovered. As the Jiaojia gold ore belt coincided with the fault zone, the position and shape of the northern Jiaojia fault zone was ascertained. However, the southern part was hard to locate because of the Quaternary cover. In order to determine the southern extension of Jiaojia fault belt, we collected audio magnetotelluric (AMT) data over a 44 km×52 km area in the Shijia district, which included 23 EW oriented profiles. Twenty three pseudo -2D resistivity sections were constructed through careful data processing and a quasi three- dimensional resistivity model was constructed for the study area. Following a comprehensive analysis of rock and ore electrical parameters in the study area, in conjunction with previous geological data, apreliminary position and shape of the southern Jiaojia fault zone was identified. It was concluded that the Jiaojia fault zone was affected by the NW- EW fracture deformation in the south of Shijia district, and subsequent to the faulting was split southward into two groups of fracture to the east and west. Jiaojia fault zone is characterized by low resistivity value, the fault zone is in the lead or extrusion- formed under the background of tensile stress, and can provide a wide channel for magmatic activity. Magmatic hydrothermal entry occurs in the fault and may eventually be beneficial in the fault zone mineralization.