Abstract: By using a bet a-plane barot ropic quasigeo strophic vorticity equation, two experiments whose integration times equal to 12 model days are performed to study the interaction between vortices. In the inetial fields, there are a tropical cyclone and a dipole which consists of a cyclonic and a anticy clonic vortex. They all have smooth, regular conto urs. The interaction between these vortices can creat a seemingly diso rder and irreg ular vorticity distribution region. On the contrary, in the temporal process, in the region,an anticy clonic vortexcanal soex hibitg radually.