Sang Hongyang is a realistic politician in Han Dynasty,who is in favour of legal administration,featured with divine way——materialist nature-determining,legislative power of severe penalty and the combination of power and penalty,which has great influence on the contemporary and afterward traditional legislative and politic rules.

Considering on modern lightly punishing trend from legalists heavy punishment;

Then the writer explains that the not all the lighter penalty is available,also not all the weighted penalty is to be criticized.

One is the theory of humanistic villainy as its basis,another is the essential content that contains severe penalty,arresting the criminal and publicizing the law.

One is the theory of humanistic villainy as its basic, another is the essential content that contain severe penalty, capture the criminal and publicize the law.

This article integrates his ontology with epistemology and theory of human nature to analyze three aspects of his legal idea: the thought that Law comes out of Li; the general legal principles that we should preserve Li and repress human desires; the idea of exerting severe penalty to show power.