Abstract：The field research initiated by Mao Zhedong during Yanan period opened a correct road for achieving the Marx doctrine in China, which based on the research thought of classical writers of Marxism.Much attention from Mao Zedong and other leaders of the Central Committee of CPC is the driving force for the popularization of field research;the related policies put forward by the Central Committee of CPC is the guarantee for the field research at that time.The theory and practice of field research during Yanan period is an important component of the philosophy of Mao zedong's thought, besides, it is also a scientific way to sinicize, to popularize and modernize Marxism.

Keyword：Yanan Period;Mao Zedong;field research;Sinicization of Marxism;