Abstract: In order to interpret and verify the physical model and mathematical model of chemical reaction kinetic for gas explosion induced by shock wave,the reaction system of gas explosion induced by shock wave was defined as an ideal reaction system where all the reactions reacted in,and the gas was defined as pure CH4 . The module was Normal Incident Shock of CHEMKIN4. 1. The methods of numerical analysis and mathematical physical equations were used to deduce,detail and verify the mathematical model of reaction kinetic for gas explosion induced by shock wave. The con- clusion shows that the function relationships between the flow characteristic of reaction components in shock tube and axial distance or time-dependent were interpreted by the governing equations of calculation model. The changing process and change conditions of chemical reaction kinetic for gas explosion induced by shock wave were verified by the solutions of equations. Therefore,the calculation model of chemical reaction kinetic for gas explosion induced by shock wave was interpreted and verified.