Abstract: Based on percolation mechanism analysis of low permeability gas reservoirs,combined the effect of Klinkenberg,established non-linear percolation mathematical model.Measured coefficient of slippage,seepage index and seepage coefficient by experiment,and compared calculated results with spot results and verified the effectiveness of this method.Slippage effect exists in porous media flow,especially when pressure,velocity or permeability,it is very obvious,also gas flow equation in porous media with a slippage effect was presented.This research has provide a strong technical support for the optimization of development plans and recovery schemes.