Trait anxiety, a person's inherent factor, potentially affects their psychological health level. In this paper，by using questionnaire survey, 218 coal mine workers in large coal mine group of Shanxi Province are investigated for the situation of trait anxiety and unsafe mentality. The data are analyzed through SPSS19.0. The statistical methods include single factor analysis of variance and correlation analysis. The results show that age, length of service, kinds of work, working time/day have significant influence on trait anxiety level of coal mine workers. Psychological paralysis, antagonistic psychology, helplessness on safety and temporary psychology are significantly related to miner's trait anxiety level. There is a significant positive correlation between miner's trait anxiety level and unsafe mentality. The miner's trait anxiety level and unsafe mentality influence on each other.