By combing the development history of environmental regulation in Liaoning Province since the 1970s, the development status of Marine economy in Liaoning Province under different stages of environmental regulation were analyzed, and environmental regulation tools were used to analyze the performance of Marine environmental regulation. It is concluded that the economic driving force of Marine living resources in Liaoning Province is relatively low, and technological innovation ability plays a low role in enhancing the competitiveness of Marine industry. Such suggestions as to increase capital input and optimize the structure of Marine industry, and training Marine science and technology personnel to improve the level of technological innovation are put forward. In order to improve the efficiency of environmental regulation, it is proposed to improve the Marine environmental regulation system and give full play to the functions of the government.