Abstract: In order to explore the mechanism of high temperature combined noise environment on miners’ unsafe behavior, the coordination and reaction capacity of 15 subjects were tested in normal environment and high temperature combined noise environment. The four indexes of heart rate, respiration rate, number of errors and reaction time were analyzed by SPSS19.0 software, and the function of individual safety behavior ability under the influence of environmental factors was proposed. The results showed that the combination of high temperature and noise would lead to the increase of the heart rate, respiration rate and number of errors of the experimental subjects and prolong reaction time, which reduced the safety behavior of the experimental subjects and increased the probability of the unsafe behavior of the experimental subjects. Secondly, the experimental subjects numbered 2^#, 3^#, 4^#, 5^#, 10^#, 11^#, 13^# evaluated better safety behaviors and better adaptability to harsh environments.