″Responsibility of the government, duty of the lawyer, and participation of civilians″ under the guidance of the government constitute the Chinese model of legal aid. Due to scarcity of resources and inadequate investment, the government has used its strong administrative power to increase financial input. At the same time, it confers mandatory obligations to lawyers and other legal workers to enlist free legal services and social donations to make up for the shortage of financial resources. This model has a salient administrative feature, and the problems caused by this kind of arbitrary political model are beginning to surface. The empirical research shows that there are several problems with the supply of legal aid in China: limited increment and the unbalanced supply structure. Meanwhile, the legal demand and the potential demand for legal aid have been on the rise. The regression analysis shows that, in the supply-demand relationship of the legal aid in China, the caseload growth of legal aid is closely related to the increase of financial investment. This relationship shows that in the future, the contradictions between supply and demand will aggravate if the growth of legal-aid funds is limited and the demand for legal aid is expanded. Insufficient motivation for reform is an inherent defect in the Chinese model of legal aid. Firstly, the resource input mode is not sustainable. A simple reliance on increased financial input cannot break through the limit of the cost of public services, and the profit-seeking nature of the legal service market determines the unsustainability of free legal aid. Secondly, there are defects in the operation mode of the administrative organization. For example, the ambiguity of government functions results in low administrative efficiency; the orientation of government responsibilities leads to the imbalance of the structure of legal aid cases; and the autonomous function of voluntary civic participation is suppressed. Based on the empirical study and analysis, the reform of the legal aid model in our country should aim at enlarging supply capacity and improving supply quality in constructing a government-led, collaborative government-market-society governance model. Firstly, it is necessary to reorient the main body of responsibility in legal aid to shift the responsibility from the government to the state. Secondly, it is necessary to establish a diversified supply mechanism and form a three-in-one supply mechanism of the marketization, administration and socialization of legal aid. Finally, it is hoped that a collaborative governance model will be constructed to achieve the dynamic balance between social total supply and aggregate demand of legal aid. The ternary state governance structure of the government, the market and the public is becoming clearer. Within the overall framework of state governance, the state responsibility of legal aid needs to be defined and a collaborative governance model of legal aid will be constructed. This model will give play to the government's macroscopic management and supervision, market efficiency, the competition mechanism, social diversity and added value. Under the background of advancing the state governance system and the modernization of governance ability, the multi-collaborative governance model of legal aid should fit into a proper category and play a more important role in the construction of the state legal system.