The construction of university legal aid is an important part of China’s legal aid system, and also an important reform task in deepening the reform of the judicial system proposed by the 18th National Congress of the Communist Party of China. However, as China’s legal education mode is still dominated by traditional theoretical teaching and case teaching methods, teachers’ pure compulsory guidance, as the main body of legal aid organizations in colleges and universities, will inevitably increase their research pressure. Students’ voluntary participation takes up a lot of time and increases their academic pressure, and the development of legal aid organizations in colleges and universities also falls into a dilemma. From the perspective of realistic legal education, this paper deeply studies the development model of legal aid center, pursues the rationality of the legal aid system in colleges and universities, and proposes to formulate the grading standard of legal aid in colleges and universities from the construction and ontology dimension of legal aid system in colleges and universities. The legal aid system of colleges and universities should be improved from four aspects: party building, social union, student organization, and network operation. This puts forward the university legal aid “1+4” solution measures. Through exploring the common measures of legal aid construction in universities, the legal aid of universities has become an important force in the development of public legal service causes in the country.