Abstract: Although “Civil Litigation Law” established environmental public interest litigation system，but does not specify which organs and tissues as the plaintiff，but also the lack of specific mechanisms and procedures for environmental public interest litigation，making the judicial application faces many difficulties.Because the prosecution is the most appropriate representative of environmental public interest，starting environmental public interest litigation meet the nature and functions of the prosecution，prosecutors also have expertise and capability to start environmental public interest litigation，so prosecutors have rationality to participate in environmental public interest litigation，even better environmental protection administration departments and other administration departments according to law.In the system construction，the author proposes the principle of the whole process involved in environmental public interest litigation for the prosecution，that participate in environmental public interest litigation by support sue，prosecutorial supervision，sue directly.Specific systems include registration，environmental public injury investigation，and filed litigation and so on.

Key words: procuratorial organs, environmental public interest litigation