Petrophysical parameters of Picheng Rock Group were obtained for the first time through measuring bore samples of ZK03 hole, which included density, susceptibility,remanent magnetization, resistivity and polarizability. The density of Picheng Rock Group is 0.15×103 kg/m³ higher than that of the surrounding rocks and makes up a precondition of gravitational exploration. Picheng Rock Group has high resistivity and show obvious resistivity difference from part of surrounding rocks, and hence resistivity exploration can be conducted under certain conditions in this area. The magnetic method and IP method must be used with care because of low magnetic properties and low electrochemical activity of Picheng Rock Group.