The percolation mechanism of tight gas reservoir is the Basic Theory of development. The research status of tight gas reservoir was surveyed in this paper. The stress sensitivity of core samples in Sulige gas field was studied through experiment. In the meantime, the progress of percolation mechanism of tight gas reservoir was presented associated with the research status of the low permeability gas reservoir. The expression of effective stress of the tight gas reservoir, The non-darcy seepage flow of the fractured gas well,the threshold pressure gradient,the water film thickness and the petrophysical analysis of the tight gas reservoir need to be studied in future.