Based on the survey data of national peasants entrepreneurship，this paper analyses the effects of social capital (Social Network) on farmers' recognition of entrepreneurial opportunity and opportunity attribute，by using ultivariate ordinal logistic and probit regression methods .The result shows that scale of farmers' embedding social network has positive influence on probability of the opportunity recognition.The scale of weak joint social network and contact frequency have positive influence on the innovative opportunity recognition，but strong joint social network has no significant influence on copying opportunity recognition. At the same time，entrepreneurial farmer's education，experience of non-agricultural working，creativity，strong entrepreneurial atmosphere are important factors affecting farmers' opportunity identification.