This paper gives a brief account of the research results gained in the aspect of application basis of induced polarization method for finding oil-gas reservoirs. These outcomes are based on lots of surface test and investigation and systematic analysis of geophysical, geochemical as well as petrological and mineralogical characteristics of shallow strata both inside and outside the oil district. It deals emphatically with some typical application examples and results of applying induced polarization method to the prospecting for oil-gas resources. Finally, a discussion is given on some troubles encountered in the work and some problems which deserve noticing in future work.