The constitutional principle of proportionality is gradually a primary principle of constitution referees around the world after the second world war,and it becomes the judicial review standard by the judge frequently used whether the law limiting constitutional rights. It is composed by four principles,namely the proper purpose principle,the rational connection between purpose and restriction,the principle of necessity and the narrowly-defined principle of proportionality. In fact,the constitution of our country has preliminarily established the basic model of the constitutional principle of proportionality to the state to limit the basic rights through the law. At the same time,it is also seen that there is no shortage of criticism on the principle of proportionality,especially in the narrow sense. Although the narrowly-defined principle of proprtionality itself has some inherent defects,but it is a very important legal interpretation or constitutional interpretation method in the whole system of legal methodology,and it is generally adopted by legislators,law enforcer and judiciary in each country.