This short esssay analyses briefly the formation of Yuan Xin Lun Zui,as a legal reasoning idea and legal principle in Chinese legal tradition, and puts forward its influence on traditional Chinese legal practice when used as a value trend.

There are three uncertain provisions: what is in violation of state regulations ? what actions belong to other illegal operation ? what circumstances can be deem serious ? Between the principle of a legally prescribed punishment for a specified crime and every points of the above may have collisions.

Developing from its emerging time to nowadays, the principle of a legally prescribed punishment for a specified crime has been well - accepted as the fundamental principle of criminal law in most countries.

the establishment for the crime of a major safety accident of educational facilities, which has been increased in the new criminal code in China as a new crime, not only, reflects the confirmation of the principle of a legally prescribed punishment for a specified crime in the current criminal code but also provide with theoretical basis and exploratory space for the research of education crime.

The principle of a legally prescribed punishment for a specified crime is the fundamental issue in the criminal theory and practice.

This article aims to enrich the theory base of a legally prescribed punishment for a specified crime, deepen how to understand a legally prescribed punish for a specified crime, show the essence of a legally prescribed punishment for a specified crime and the value in the justice practice.