Social network affects the attention, search, interpretation of entrepreneurial information and the iden? tification and evaluation of entrepreneurial opportunities for college students. With a survey of 362 college entre? preneurs, this paper explores the impact of social networks, college entrepreneurship education and entrepre? neurship policies on entrepreneurial alertness. The results show that all dimensions of college students?? social net? work have a significant positive impact on entrepreneurial alertness. College entrepreneurship education pro? motes the process of network heterogeneity affecting entrepreneurial alertness, and college entrepreneurship policy prompts the process of network scale affecting entrepreneurial alertness.