Abstract: To control eutrophication in the Bohai Sea with consideration of equity and efficiency, a total pollutant load allocation model was built based on the linear response field with a total load allocation index (TLAI) constructed with six factors:environmental capacity, water resources, population, agriculture area, GDP and present discharge load. To evaluate the effects of the factors in the TLAI on the allocation results, seven weight coefficient scenarios (F11,F12,F13,F14,F21,F31,F32) were put forward in three categories:complete factors, emphasis on the water resources and emphasis on the non-point sources. The result showed that the amount of TN effluent discharge load (16.4×10⁴ t/a) was 3.5 times higher than the environmental capacity (4.7×10⁴ t/a) of the Bohai Sea. However, more than 50% of the environmental capacity could not be allocated due to the locations of the pollution sources and the principle of equity. The allocation results were compared by two indices:the total reduction rate and ratio of the pollution sources with reduction rates equal or greater than 95%. The allocation results of the scenarios, which only emphasized certain factors such as environmental capacity, water resources and farmland, were obviously infeasible. Both fairness and efficiency were considered in the scenario F13. Considering the total reduction rate and the ratio of pollution sources with more than 95% cut rates, the scenario F13 was more preferred than others. Based on the scenario, the reduction rate of total nitrogen was 85%, and the 10 biggest reduction pollution sources contributed about 79% of the total reduction amount.