The kinetics of methane hydrate decomposition was studied using Sapphire cell apparatus. Two different ways were adopted to measure the kinetic data of methane hydrate decomposition at temperatures from 269-279K and pressures from 0.1-3.0MPa.It was revealed that the decomposition rate of methane hydrate was proportional to the difference between gas fugacity at the equilibrium state and that at the actual decomposing state.A new kinetic model for methane hydrate decomposition was developed. It was shown that calculated results by the model were in good agreement with experimental data.The activation energy of decomposition reaction for methane hydrate was determined as 73.3kJ·mol -1(methane).