Abstract: Based on the coupling relationship among gas seepage field, stress field and coal deformation field, a gas transport gas-solid coupling model is established under considering the Klinkenberg effect and the numerical simulation of hydraulic punching coupling model under different coal output conditions is carried out. The results show that the effective radius of hydraulic punching increases with the increase of extraction time and coal output. The Klinkenberg effect promotes the transport of gas in low permeability coal seam, and in the same time, the effect increases with the increasing of extraction time. The decrease of gas pressure in coal seam increases the effective stress of coal skeleton, and the pores in the coal are compressed, which results in a decrease in porosity and permeability.