Abstract: In 1924,after the reform of Kuomintang,a northern power with Ding Weifen as its leader grew gradually by taking the opportunities of the first collaboration of Kuomintang and the Communist Party and the opposition to the Xishan meeting group within Kuomintang. It also made use of opportunities of taking care of the Party business and leading northen people against the warlords to enlarge its strength,and eventually became the Dingjia Clique. It turned to be the right wing of the Kuomintang in the climax of revolution. After the Revolution of 1927,Kuomintang was all split up. Jieshi put more attention to military affairs. At the same time, the power of Chen Guofu and his brother was weak in Kuomintang. Thus the northern power called Dingjia Clique became one of the important forces in Nanjing Government and it was said that at that time Jiang's Dynasty relied heavily on Dingjia clique.