Abstract: With the rapid economic development in coastal cities, problems such as marine resource consumption, environmental pollution, ecological damage have become increasingly serious.As one of the main means to evaluate the sustainable development of oceans, quantitative research of the eco-environmental carrying capacity is essential.Based on the "Pressure-State-Response" (P-S-R) conceptual model, this research established an evaluation indicator system of the marine eco-environmental carrying capacity.A State-Space evaluation model was constructed using the indicators which were empowered by the principal component analysis (PCA), entropy method and evaluation method in sequence.An empirical analysis of evaluating the eco-environmental carrying capacity of Shenzhen eastern coast ocean was conducted with the State-Space model with the main reasons for the state of overloading identified, which will provide a scientific basis for the sustainable use of marine resources.