Abstract: In this paper, the desorption performance of the adsorption material was studied under high temperature and vacuum environment with weighing method. This paper is to explore the effects of different temperature and pressure on the desorption performance of SAPO-34 zeolite molecular sieve. It shows that the effect of temperature on desorption performance is much greater than pressure. When the pressure is constant, the desorption perfection degree of the material becomes larger with the increase of temperature, and its distribution is not uniform with the temperature change. SAPO-34 is destroyed with a high temperature. When the temperature is constant, the desorption of the material becomes larger with the decrease of the pressure, and the change is more uniform with the pressure distribution.