Abstract: Student union backbone is the key minority to promote the reform and development of student union, timely grasp the ideological dynamics of student union backbone has important practical significance for deepening the reform of student union of higher vocational college. Through questionnaire survey and data analysis, it found that the ideological status quo of student union backbone in higher vocational colleges in Guangdong province, such as: highly recognizes the student union organization, and the purpose consciousness of serving student needs to be improved; firmly supports the leadership of the Party, and the awareness of ideological and political guidance urgently needs to be strengthened; generally supports the reform of the student union, the strength of the support from the school needs to be improved. It puts forward to strengthen the thought of purpose of serving students consciousness, to strengthen the ideological and political leading consciousness, to increase the support of student union work and so on.