Abstract:Realizing high-level technological self-reliance and self-improvement is a necessary path to build a new development pattern of domestic and international dual circulation. How new research and development institutions can collaborate with social capital to optimize resource allocation capabilities is an important issue that urgently needs to be explored. In venture capital practice, joint investment is a very common and important strategic choice behavior. This article constructs an evolutionary game model of bilateral investment strategy behavior between new research and development institutions and social capital, uses MATLAB to simulate bilateral investment strategy selection, and analyzes the optimal adjustment method of joint investment probability under different parameter conditions. Research has found that: firstly, alleviating funding gaps, risk avoidance, and resource complementarity are the inherent driving forces behind the formation of syndicated joint investment between new research and development institutions and social capital; Secondly, the evolutionary game system of joint investment between new research and development institutions and social capital has complex path dependence, and the stable state of evolution depends on the initial state of strategy selection and key parameter adjustment mechanism of both parties in the game. Thirdly, effective suggestions for promoting joint investment were proposed by controlling factors such as cooperation benefits, cooperation costs, risk coefficients, default coefficients, and government subsidies in the investment project parameters. This study provides useful references for resource allocation and risk management decision-making in new research and development institutions.