Abstract. This paper discusses the relationship between institutional environment and technological innovation performance from the perspective of MOA, and analyzes the moderating role of external social capital and top management team heterogeneity in the relationship between institutional environment and technological innovation performance.It is found that good institutional environment can improve the performance of technological innovation significantly; social capital as an informal, non-mandatory system to regulate individual behavior and promote the company's technological innovation performance; senior management team heterogeneity and technological innovation significantly Negative correlation. Finally, it discusses the management revelation of the conclusion and gives some policy suggestions.