Abstract:In the post-epidemic era, the adoption of innovation vouchers around the world to stimulate the transformation of science and technology(S T) achievements among enterprises has become an effective tool for sustainable and high-quality economic development. In this paper, an improved minimum cost-maximum flow model is constructed, in which the critical ratio of technical product promotion will dynamically adjust the technical product supply strategies of nodal firms, and three scenarios are simulated by numerical assumptions. The results show that: (1) The model can effectively solve the optimization problems of innovation vouchers, critical ratio of technical product promotion and transformation of S T achievements; (2) Technology suppliers can transform the largest number of scientific and technological achievements of various types, and the issuance quota of government"s innovation vouchers can reach the lowest; (3) The size of the critical ratio of technical product promotion will affect the effect of S T achievements transformation from the technology suppliers. The recommendations were made, hoping to better help the government implement the innovation voucher policy to accelerate the diffusion and application of technological achievements among firms.