Abstract: On the basis of mining tremor records,mining status, meteorologic dare and tectonic structure of Laohu Tai coal mine, the time and frequency's sequential features of mining tremors are studied.Based on the linear regression result of the magnitude-frequency distribution, the sequential features of parameter a and b, in equation logN=a-bM,are analysed.Some fundamental principles about mining tremors' activity in Laohu Tai coal mine are summarized.