Abstract: At the critical stage of the development of big data industry at home and abroad, the role of the government in promoting emancipation and discovery, guidance, support, promotion and standardization is a pre-emptive strategic selection of promoting the high-quality development of the big data industry. In the development of big data industry, the government should play the support mechanism of public services, the guiding mechanism of economic regulation, the acceleration mechanism of social management and the normative mechanism of market supervision. Specifically, these mechanisms include infrastructure construction mechanisms, government efficiency promotion mechanisms, human resource supply mechanisms, business environment creation mechanisms, R&D investment induction mechanisms, fiscal and tax policy incentives, fund support mechanisms, and universal application mechanism of big data, the social security mechanism with guaranteeing basic living standard for people unable to work, the data resource aggregation mechanism, the industry-oriented leading mechanism, the market access screening mechanism and the administrative law enforcement correction mechanism. Only by achieving the synergy of the government's role mechanism can we promote the high-quality development of the big data industry.