Abstract: The liquid lithium lead alloy is a prominent breeder material for the fusion reactor tritium blanket. For an effective calculation of the knowledge of kinetics of tritium release behavior from liquid LiPb alloy, a mathematical model is built by taking into consideration the theory of metals and hydrogen and the design of the bubble tritium extraction system from the liquid Lithium-Lead module for fusion reactor. The calculation data of tritium release-behavior from liquid LiPb under different operating conditions of tempera-ture and tritium partial pressures and helium gas flow-rates and mass transfer coefficients are obtained. These results have shown that the overall release process, even though including five sub-processes （transport of the tritium by diffusion and convection, transport of the tritium by diffusion through a layer of eutectic adjacent to the gas-eutectic interface, heterogeneous reaction at the interface of the tritium atoms recombination, diffusion of the tritium through the gas-phase boundary layer, transport of the gaseous tritium by diffusion and convec-tion from the gas phase boundary layer）, is governed by the diffusion of tritium atoms in the LiPb and by the heterogeneous reaction at the gas-eutectic interface of the tritium atoms recombination in the desorptiong temperature vary from 633 to 723 K.