At the age of world history， different thoughts that dedicated to “saving the country from subjugation and ensuring its survival” flowed into the ideology of nationalism. Nationalism was complex due to its pluralistic subjects. In the 1920s， nationalism had become a common discourse to motivate the public with the party as its dominant interpreter. Nationalism was firstly rejected and then accepted by the CPC. The CPC rebuilt nationalism by constructing and criticizing it from the perspective of “antiimperialism” after examining the essence of “imperialism” and its manifestation in China. By integrating and reshaping， the CPC gave nationalism a new look in the 1920s， and the CPCs leading role in shaping the nationalism was just a result of the sinicization of Marxism.