Abstract:Under the background of the continuous economic slowdown, it is imperative to build China into a strong maritime country, and the innovation of marine science and technology is an important means to play the role of the "Blue Engine" of the marine economy. Therefore, based on the analytical framework of "Growth at Risk", the panel data of 11 coastal provinces and cities from 2006 to 2019 are used to construct the panel quantile regression model which fits the conditional distribution of marine economic development level, and analyze the impact of marine scientific and technological innovation on the overall distribution of expected marine economic development level and tail risk. Research shows as follows: The driving effect of marine science and technology innovation is heterogeneous due to different levels of marine economy development, and can reduce the downward risk of marine economy; In areas with high resource endowment, marine science and technology innovation affects the development of marine economy; Marine science and technology innovation promotes the development of marine economy through the upgrading of marine industrial structure; Education investment and information level can adjust the effect of science and technology innovation on marine economy. Based on the above research results, this paper puts forward relevant policy suggestions. In order to promote the further high-quality development of Marine economy, on the one hand, we should pay timely attention to the risks of Marine economy, and on the other hand, we should strengthen the investment in Marine science and technology innovation.