The implement of enterprises open innovation has great significance on improving its innovation ability. The main purpose of the enterprises implement of open innovation is to obtain the ten key resources, and the measurement of enterprise innovation ability mainly focused on the enterprise inject, production, management, marketing, output five aspects. The thesis constructed the relationship model between open innovation and enterprise innovation ability, and used structural equation model to verify the rationality of the conceptual model of relationship, the result of which shows that both the horizontal and vertical cooperation between enterprises, the government-industry-university-research cooperation as well as the public innovation platform construction is conducive to the improvement of enterprise innovation ability.