“和子之乱”是战国早期发生于齐国的一次严重内乱。由于文献记载过于简略,和子之乱已难考其详。近年公布的清华简《系年》,为了解和子之乱的真相提供了宝贵材料。综合分析《系年》与传世文献的相关材料,可以得知:和子之乱又称项子牛之祸。所谓项子牛之祸,可能指田和指使项子牛弑杀田悼子所引发的内乱。三晋利用齐国的内乱,联合出兵讨伐齐国。项子牛之祸为三晋干涉他国内政,并谋求其国家政权被周天子和列国所认可,提供了历史契机。 “And child chaos ” is a serious civil strife that occurred in Qi State early in the Warring States Period. As the literature is too brief, and child disorder has been difficult to test its details. In recent years, Tsinghua University, “Department of Year”, in order to understand the truth and sub-chaos provided valuable information. A comprehensive analysis of the “Department of” and related documents handed down the literature, we can learn: Hezizi chaos, also known as the curse of a cow. The so-called curse of the curse may refer to Tian and the clan that caused the incident to kill Tian Mourning caused by civil strife. Three Jin Qi use of the civil strife, joint troops to crush Qi State. The curse of the sub-prime minister provided the historic opportunity for San Jin to interfere in the internal affairs of other countries and to seek the approval of his country’s regime by Zhou and his countrymen.