Abstract: To scientifically evaluate the implementation effect of the river chief system and provide a research idea for the evaluation of the implementation effect of the river chief system,taking Huai’an City as the research object,21 indicators are selected from the perspectives of economic,social,ecological,cultural and watershed management effects to construct an evaluation model of the implementation effects of river chief system. The subjective weights are determined by the sequential relationship method（G1）,the objective weights are determined by the entropy weight method（EVM）,the combination weights are obtained by the game theory combination assignment method,and the G1-EVM-SPA based evaluation model of the implementation effect of the river length system is constructed by combining the set-pair analysis method（SPA）,and the time dimension is selected from 2017 to 2020 to evaluate the effectiveness of the implementation of the river chief system and the degree of coordinated development in Huai’an over the past four years since the full implementation of the river chief system.The results show that the implementation effect of the river chief system in 2017 is moderate,and the implementation effect in 2018-2020 is good,and the trend is improving year by year. The coordination development degree of the implementation effect of the river chief system in2017-2020 is 0,0.501 8,0.484 5,and 0.497 3,respectively. Except for 2017,which is under the highly uncoordinated grade,the coordination development degree grades in 2018-2020 are under the critical coordination grade. The overall coordination development degree is improving year by year.