Abstract:Academic spin offs (ASOs) always get inherent innovation advantages once they were born due to the ties with their parent universities or scientific research organizations. However, with the expansion of scale and new capital investments, these advantages did not fully show up in Chinese ASOs. More particularly, some ASOs that used to be outstanding in China fall into bankruptcy crisis. In order to find out whether corporate governance is a key factor of insufficient innovation , this paper studies the impact of ownership concentration on innovation, taking samples of ASOs from 189 listed companies in China. Innovation is measured by both R&D input and competitive advantage from innovation, and ownership concentration is represented by the sum of the shareholding ratios of the top five shareholders. Regression analysis is conducted through Stata 15.0 software tool. Data shows that ownership concentration has significant positive effect on enterprise innovation, and innovation input has the scale effect rather than the Silicon Valley paradox, indicating that relatively concentrated decision-making power is more conducive to innovation in Chinese ASOs. Meanwhile, parent tie plays a moderation role between ownership concentration and innovation advantages in ASOs, but it still works in the stage of innovation input.