Abstract: The carrying capacity evaluation method for marine ecology which can deal with the relationship among indices is constructed based on analytic network process, and it is employed to compute carrying capacity index of marine ecology and analyze contribution factors for China's eleven coastal provinces (region, city) during 2006-2014.The results show that the key indicators which have important influences on marine ecological carrying capacity are regional population size, regional marine GDP, marine aquatic production, ratio of the first two sea water quality levels, and pollutant discharge level directly discharging into the sea.According to the distribution of carrying capacity index, Guangdong, Shandong, Zhejiang are high carrying capacity regions; Fujian, Liaoning, Shanghai are middle carrying capacity regions; Jiangsu, Tianjin, Hebei, Guangxi, Hainan are low carrying capacity regions.According to the distribution of contribution factors, Guangdong, Guangxi, Hebei, Jiangsu, Liaoning, Shandong, Zhejiang belong to the type of social pressure orientation; Shanghai and Tianjin belong to the type of ecological background orientation; Hainan belongs to the type of scientific and technological supporting orientation; Fujian belongs to the type of resource supplying orientation.