Abstract: Ideological wok is the work of setting up the heart for the country and the soul for the nation.Colleges and universities are the forefront position of developing mainstream ideological education.Underthe background of big data ena ，strengthening the mainstream ideological education of young students hasbecome an import ant task of ideological and political education in colleges and universities. At present,the mainstream ideology education in colleges and universities in our country is faced up with many chal-lenges and problems , such as the slow application of the platfom of coopenative education，the education-al mode being hit , the dispelling of the authbority of the mainstream ideology and the bluwring of the identi-fication degree of the mainstream ideology. 'Therefore ,the mainstream ideological education in collegesand universities should meet the new requirements of the big data era，build the cooperative educationplatfom，innovate the educ ational model，optimize the educational system and mecharnism ，and enrichthe content constnuction to improve the dissemination ,attraction，leading and identification of the main-stream ideological education in colleges and umiversities，and to explore the effective path of the main-stream ideological education in colleges and universities，strengthen the leading ability of the mainstream ideology to all kinds of ideas and social trends of thought，consolidate and strengthen the leading positionof the mainstream ideology in colleges and umiversities，and ensure that colleges and universities alwaysbecome a strong position of setting up morality and cultivating people.

Key words: big data, colleges and univesities, mainstream ideological eucation, dilemma, effective path