The attention change and distribution of the central government to support the innovation and development of enterprises are of great significance to the innovation and development of enterprises in China. The policy attention evolution of enterprise innovation and development reflects the intensity and direction of the government to support the enterprise innovation and development.This paper mainly uses ROSTCM 6 software to analyze the central science and technology policy text from 1983 to 2019, and manually arranges the changes of policy discourse, and summarizes the changes in the attention intensity of the central government supporting the innovation and development of enterprises in this period.The research shows that: (1) the attention intensity of the central government to support the innovation and development of enterprises has experienced a change process of "fluctuation rise" to "relatively stable"; (2) The central government''s policy focus on supporting enterprise innovation and development has undergone a change process from "enhancing enterprise vitality" to "innovation-driven development", In different periods, the central government has different cognition and needs to support enterprise innovation and development, The government''s requirements for enterprise innovation and development are also constantly improving; (3) The central government''s attention to supporting the innovation and development of enterprises has shifted significantly, The technological innovation of Chinese enterprises has undergone a strategic transformation from "re-introduction and learning" to "innovation-driven development", The transformation of system construction from "heavy management" to "service", It reflects the further improvement of the national requirements for enterprise innovation ability.