Proportion principle is the essential rule inadministrative law of many countries，whose connotation is that，according to its legalbase administrative power should beexercised in the way which has minor harmon the people. Due to the lack of the regulation of law，administration enforcement right has become one of the most active and the most misused rights in our country. This article defines the proportion principle，analyzes its ef ective regulation on the enforcement of administrative law and studies the path of regulating and ruling the administration enforcement right by using proportion principle.