Abstract The knowledge diversity and social relationship network of entrepreneurial team largely influence the technological innovation and innovation achievement transformation of technological startups, and then affect the growth of technological startups. Entrepreneurial performance depends on the heterogeneity of entrepreneurial team to a great extent. The current research based on linear correlation fails to reach consistent conclusions. This study explores how heterogeneity of entrepreneurial teams influences entrepreneurial performance. Based on 304 new venture in Henan province, the results show that entrepreneurial teams heterogeneity has an inverted Ushaped relationship with entrepreneurial performance, which is negatively moderated by innovative atmosphere, and positively moderated by social relations network quality. While, team members' social network heterogeneity has a positive impact on entrepreneurial performance, which is positively moderated by innovative atmosphere, and social relations network quality.