Abstract: The initial absorbing rate at different temperature, the P C T curves and the relation between equilibrium pressure and temperature of deuterium absorption and desorption of ZrV 2 are measured. And then the thermodynamic parameters of the two processes are determined according to Van't Hoff equation. Also, the deuterium absorption capacity and the equilibrium pressure of the absorption and desorption at room temperature of ZrV 2 are given.