Abstract:From the three aspects of marine innovation environment, marine innovation input and marine innovation output, we select indicators to construct urban marine innovation index. Based on the scientific and technological statistics of the marine scientific research institutions from 2001 to 2016, the marine innovation ability of the sea-related cities in China is evaluated, and the distribution and trend are analyzed. The research shows that the marine science and technology resources allocation in China is not balanced, and the development of the southern sea -related cities is better than the north. There are obvious regional differences among the marine innovation ability and its’ internal elements of the sea-related cities, and the efficiency of marine innovation needs to be improved. Finally, countermeasures are put forward for the current problems.