上诉不加刑原则,已被当今世界上许多国家的刑事诉讼法所确认.我国刑事诉讼法第一百三十七条第一款规定:“第二审人民法院审判被告人或者他的法定代理人、辩护人、近亲属上诉的案件,不得加重被告人的刑罚.”这就是我国刑事诉讼法规定的上诉不加刑原则.目前,对如何正确认识和执行这项原则,还存在不同的看法和做法,本文拟就这一问题谈点看法. The principle of appeal without penalty has been affirmed by the criminal procedure law of many countries in the world today.Article 137 of the Criminal Procedure Law stipulates in the first paragraph: “The people’s court of second instance trial the defendant or his legal representative People, defenders, close relatives in the case of appeals shall not aggravate the defendant’s sentence. ”This is the principle of the Criminal Procedure Law of our country not to impose punishment principle .At present, there are still different views on how to correctly understand and implement this principle and Practice, this article intends to talk about this issue.