Five thousand years of national history have forged the collective consciousness of the Chinese nationalities of solidarity, prosperity, and loss, and its effective dissemination has provided support for the thorough casting of Chinese national community consciousness. Starting from the core content, scientific connotation, and contemporary value of the national community consciousness, the article combines the Lasswell 5W model to innovate the communication pattern of the national community ideology. It establishes an evaluation index system for the communication effect. Taking China's major universities as the research object, the entropy value method is used to calculate the weights of the evaluation indexes, and a fuzzy comprehensive evaluation model of the dissemination effect of the ideology of the national community is established. Combined with the questionnaire data, the independent sample test and ANOVA are used to compare the differences in the ideology of the national community among college students. A multi-dimensional fuzzy comprehensive evaluation of the dissemination effect of the ideology is carried out. Whether college students have student cadre experience or not shows a significant difference at 1% level, the weight value of the indicator of communication content is 0.2734, and the comprehensive evaluation score of ideology communication effect is 7.32, which is in the middle-upper level. The ideological communication effect of the national community needs to be coordinated by the government, the media, the community, and colleges and universities to actively build a linkage communication situation in which the consciousness of the national community is “dominated by one party and coordinated by many parties”.