“Xinmin lnstitute” is a academic group which is found by Mao Zedong and his schoolmates. It is a quite important role in Mao Zedong's thought development and the political activity. In short, Mao Zedong practiced almost each thought by “Xinmin lnstitute” at that time, specially “Xinmin Theory” of Liang Qichao. And Mao Zedong was changing to be a socialist later. Mao Zedong also had opportunity to practice his ideal first time by “Xinmin lnstitute”, and Mao shape his model of political ideal disposition in this “academic group” which he held. If we want to research the development process Mao’s thought, it is an important key to understand and analyse Mao’s condition of though in “Xinmin lnstitute” period.