Data from 36 listed marine-related enterprises in China was collected and the fuzzy-set qualitative comparative analysis method were applied to investigate the influencing factors and conditional histories of pro-environmental behavior of marine-related enterprises from three levels of "technology-organization-environment".The results show that there are six paths leading to pro-environmental behavior, which can be classified into four types: relationship-driven, technology-driven, institutional-driven, and scale-driven. The environmental protection system imposes requirements on enterprises to protect the environment in a mandatory manner; inter-enterprise cooperative relationships and external relationships of enterprises can create invisible external pressure on enterprises, which can strengthen pro-environmental behavior. Based on the above conclusions three suggestions are put forward. Environmental protection laws and environmental protection inspection system should be improved, the development of industry associations and inter-enterprise communication platform should be supported,and enterprises should be called on to establish environmental awareness and take the initiative to assume social responsibility.