Based on testing and evaluating dust hazards  qualified total dust concentration tested during short time showed in a coal mine enterprise, but to detect over run multiples of total dust concentration approaching limits in part detection points  mining face and whole-rock tunneling face. According to test results and production environment hazards during analysis, hazards of dust should be controlled  from Legitimacy, technical ability and the occupation disease prevention and management, and dust protection measures should be adopted to improve the production environment and reduce dust pollution.