Abstract: Coal mining operation group is in the organization of coal mining enterprises small social network, this paper based on the research of social network theory and trust theory, proposed coal mine group network dimension (strength, asymmetric relationship) and structure dimensions (network density, network centricity, network scale, structural holes, condensing subgroup) through interpersonal trust influence the spread of the unsafe behavior in the network. Data were obtained through the questionnaire survey, the theoretical model was tested, and the conclusion was drawn that each dimension affected the diffusion of unsafe behaviors through mediating variables, and then the control measure of unsafe behaviors based on the group were proposed.