Abstract: In order to make clear the location of the eastern boundary fault, the fault dislocation and the buried depth of the upper fault of the Tangshan-Hejian-Cixian seismic tectonic zone, four shallow seismic survey lines were laid near Linxi County and Linqing, and four high-resolution shallow seismic survey profiles were obtained. The Guantaoxi fault is detected by DZ1 and DZ2 line. The buried depth of the fault is 300 m. The latest active age of the Guantaoxi fault is Middle Pleistocene, DZ3 and DZ4 line detected Cangdong fault. The buried depth of the fault is 270 m. The latest active age of Cangdong fault is Middle Pleistocene.