In the process of spreading Marxism,newspapers during the founding of CPC reflected the ideas and features of focus communications.Based on the comparision of contents between Communist Party and Labor Sector,this paper,by using the relevant theory of focus communications,analyzed the Marxism popularization during this period from the following aspects:different locations for different periodicals during the founding of CPC,different ways of expression for the same contents,differences between different periodicals and their locations in writing styles and language styles so as to push forward the chinization and popularization of Marxism in modern times.