Abstract: The moral content of environmental policy refers to the moral quantity contained in environmental policy. Because environmental policy is relatively independent and social morality is relatively static,so the content of environmental policy morality can be evaluated. The core elements of environmental policy moral content assessment are policy and ethics,which together determine the logic of the generation of environmental policy ethical content evaluation indicators. Then the policy process and the moral form determine the generating logic of the primary index and the generating logic of the secondary index respectively. The primary index of the moral content of environmental policy consists of the moral foundation of the policy itself,the moral principles of the policy relations,and the moral consequences of the policy implementation. The secondary index of environmental policy moral content assessment is composed of political morality,economic morality,social morality and ecological morality. The secondary index of environmental policy moral content evaluation determines the measured index of environmental policy moral content evaluation,that is,the measured index produced by political morality,economic morality,social morality,and ecological morality.The framework of environmental policy assessment mainly includes the model,main body and operation of environmental policy evaluation. The assessment model is the ratio of the actual moral score of the specific environmental policy to the total social morality. The assessment body consists of environmental policy makers,recipients of environmental policies and professional structures. The evaluation operation is divided into four steps:extracting the moral elements,collecting the actual scores of the moral elements,measuring the moral content of environmental policies,and evaluating the quality of environmental policies.