Abstract: Based on the initial symmetric tropical cyclone and parameterised diabatic heating a set of numerical experiment is made by using the barotropic,vorticity equation with diabatic heating forcing. It is found that the β term and nonlinear advection term has significant impacts on the tropical cyclone asymmetric structure, and the tropical cyclone asymmetric structure is influenced by the diabatic heating.It has been shown that the diabatic heating is a potential physical principle of the genesis of tropical cyclone asymmetric structure.