Feng Youlan not only engaged in teaching for a long time, but also wrote a lot of works on philosophy and philosophy history. The Philosophy of Life, published in 1926, combines China's traditional philosophy with pragmatism and neo-realism, and puts forward a "golden mean" outlook on life. The first volume of China's Philosophy was published in 1930, and the second volume of China's Philosophy was published in 1934. There are English and Japanese translations, which have great influence at home and abroad. During War of Resistance against Japanese Aggression's period, he successively wrote Neo-Confucianism, Neo-realism, Neo-World Training, Neo-Primitive Man, Neo-Daoism and New Knowledge, all of which were called works in Zhenyuan period, which combined Zhu Cheng's Neo-Confucianism with Western Neo-realism and formed a speculative philosophy system. 1946 to 1947. When he was a visiting professor at the University of Pennsylvania, he wrote A Brief History of China's Philosophy in English. 1948 was published in new york with Italian and French translations. After the founding of New China, there were one or two new volumes of the History of Philosophy of China, the first draft of historical materials of the history of philosophy of China, and many new volumes of the History of Philosophy of China.