三国两晋南北朝时期,是中国历史上动荡巨烈的年代,但也是中国法制进一步发展的年代。唐律中的主要原则与制度,正是在这一阶段逐步成熟起来的。三国时期,魏、蜀、吴三国都在很大程度上继承、沿用了秦汉以来的法制。而从魏明帝太和三年开始,直至晋恭帝元熙二年(公元420年),是法制改革的阶段。这些改革分别表现在刑律的体例与刑律的具体内容上。在刑律体例上,魏明帝时期,首次把刑名篇放在律文之首,晋律增加法例篇,这样就为后来《北齐律》把刑名、 The Three Kingdoms, the Southern and Northern Dynasties, the Northern and Southern Dynasties, were a period of turbulent turbulence in Chinese history, but they were also the era for the further development of the Chinese legal system. It is at this stage that the main principles and systems in the Tang law have gradually become mature. Three Kingdoms period, Wei, Shu, Wu three countries are largely inherited, inherited the legal system since Qin and Han Dynasties. From Wei Ming Emperor Taihe three years, until Jin Gong Di Yuan Xi two years (AD 420), is the stage of legal reform. These reforms are reflected in the criminal law and criminal law of the specific content. In the criminal law system, Wei Mingdi period, for the first time put the criminal name articles in the first law, Jin law to increase the law articles, so that later “Northern Qi Law” to the criminal name,