Abstract: In order to solve the problem of heat accumulation in the low temperature adsorption process of small hydrogen storage tanks, it first carried out the finite element numerical simulation of the charging and degassing characteristics of small hydrogen storage tanks equipped with different adsorption materials metal-organic frameworks MOF-177 and activated carbon AX-21-33. Studies have found that during the inflation process, the heat accumulation caused by thermal effects and compression work will seriously affect the adsorption of hydrogen. In this regard, this article proposes a solution to add heat exchange fins inside the hydrogen storage tank. By changing the position and spacing of the heat exchange fins, the effect on the temperature, pressure and adsorption capacity in the tank during the inflation process is analyzed. The simulation results show that this scheme can effectively reduce the temperature in the hydrogen storage tank, and at the same time solve the problem of heat accumulation at the bottom. The results of this study are of value for the application of hydrogen energy.