The invention provides a productivity calculation method with the tight gas reservoir percolation mechanism taken into consideration. The method comprises the steps of 1, establishing a gas percolation motion equation with the starting pressure gradient taken into consideration; 2, establishing a gas percolation motion equation with the pressure-sensitivity effect taken into consideration; 3, establishing a percolation with the pressure-sensitivity effect and the starting pressure gradient taken into consideration; 4, describing percolation, in a gas reservoir, of fluid through the percolation equation established in step 3, and establishing a vertical shaft steady state productivity equation; and 5, describing percolation, in a stratum, of gas through the percolation equation established in step 1 according to formed infinite flow-guiding vertical cracks, and establishing a fracturing vertical shaft steady state productivity equation. By means of the productivity calculation method with the tight gas reservoir percolation mechanism taken into consideration, theoretical productivity of a gas well can be determined in the tight gas reservoir development process; production allocation of the gas well can be instructed; influence of the starting pressure gradient and the pressure-sensitivity effect on productivity can be determined quantitatively; and a great significance is achieved for studying the tight low-percolation gas reservoir.