Abstract: In order to reduce the possibility of technological innovation network members taking opportunism behaviors,this article analyzes the opportunistic situation in the technology innovation cooperation based on the evolutionary game theory and further analyzes the optimal allocation coefficient in the allocation mechanism.It is analyzed whether there is the optimal allocation coefficient which could make the enterprises cooperate with each other most likely and discuss whether the higher the punishment is,the higher the efficiency of the network cooperation is.The study demonstrates that if the profit distribution coefficient can achieve a certain value,the enterprises will have the least possibility to adopt the opportunistic strategy.And when the punishment cost reaches a certain value,the enterprises will have the highest probability to adopt the cooperative strategy.