In this article，an innovation pole，which is represented in innovation scale and drives the development of regional economy，is defined as a regional industrial innovation subsystem producing dense innovative activities． We regard the regional innovation system as a symbiosis evolution system of the multiinnovation poles． Then，in the framework of ecology theory，this article analyses the symbiosis evolution model of multiinnovation poles and sets up the dynamic model of the multiinnovation poles symbiosis evolution system． Finally，we draw the conclusion through the simulation study that: different values of the symbiosis coefficient are the only difference between regional innovation systems besides the strength or weakness of innovation poles．