Abstract: During the recharge process of pore-type thermal reservoir, the permeability of thermal reservoir decreases and recharge capacity weakens due to physical, biochemical, suspension, and gas blockages. To quantify the attenuation of permeability coefficient, taking the recharge test in Southern Liaoning as an example, the Origin software is used to calculate the attenuation equation of permeability coefficient in the area, and then the relation between recharge pressure in the well bore and time, as well as the pump lifting cycle. The results show that the application of Origin to obtain the permeability coefficient attenuation equation has the advantages of convenience, efficiency and good feasibility, which can be widely used in the data processing of recharge test.