The integrated innovation of the main body of the innovation consortium is conducive to breaking through the key industrial core technology, getting rid of the dilemma that the key core technology is heavily controlled by others, and improving the core competitiveness of the country. This paper introduces the unimpeded degree of knowledge flow and the degree of integration of innovation chain and industrial chain as the interpretation of integration innovation, and studies the integration innovation of innovation consortium subject. Build on the efforts of bivariate continuous policy set game model, investigates the innovation union subject under different situations in the process of financing innovation strategy based on hard choice, and through investment in innovation main body range and strategy research, analyzes the alignment and smooth degree of dynamic effect of innovation consortium main financing decisions. The results show that: in the process of integrated innovation of the innovation consortium, the improvement of integration degree helps to reduce the risk of integrated innovation; The risk of integration innovation increases first and then decreases with the increase of unimpeded degree; The ratio of cost and benefit of innovation subject determines the subject's strategy choice; When the unimpeded degree and the integration degree exceed a certain threshold, the best state of integration conducive to the core technology breakthrough can be achieved. According to this, the ``fusion contract" is proposed in order to improve the efforts of innovation subjects in the realization of core technology breakthrough.