Abstract: Keeping pace with time is the constant theoretical quality of Marxism.In the history of Chinese Communist Party,the Marxist localization in China has the development stage keeping pace with times and Mao Tseedong thought,Deng Xiaoping's theory and Jiang Zeming's thougth of "Three Represent's"are the great theoretical achievements of keeping pace with times.Keeping pace with times is the summary of historical experience as well as the need of the objective reality and the call of times.In the zlst century filled with hopes and challenges,"Three Represent's"are the strong thought weapon of the Chinese Communist party's always keeping pace with times.