The apparent resistivity on the fracture zone of buried fault in the Weihe basin shows always negative anomaly.The amplitude of anomaly increases and outline of fracture zone becomes more clear when the exploration depth is deepened.The linear distribution of anomaly points of apparent resistivity is a criterion for determining the strike of buried fault and evaluating the exploration result.Difference of apparent resistivity on both sides of fault shows the electrical difference of different materials on the both sides,indicating the vertical fault throw.The negative anomaly of apparent resistivity on the fracture zone of fault results from existence of rich underground water.