Abstract: In order to analyze the mechanism of cutting and dust production of coal and rock driving machine, the three axis force model of coal and rock was constructed based on EDEM method, and the coal dust cutting mechanism under different cutting conditions was analyzed. The results show that the number of bonds between particles decreased periodically with the operation time of the cutting head, the cycle length is in the range of 0.2 s to 0.7 s, and the number of broken bonds between particles increases linearly with the cutting time; the average body mass and throwing velocity of particles in the process of coal cutting with cutting depth showed a distribution of cyclical fluctuations, in addition, the average particle throwing velocity of rock mass cutting is obviously larger; the cutting depth increased gradually with the increase of cutting head operating time and the average velocity of particle throwing shows an increasing trend of fluctuation from about 1.0 s; with the increase of cutting depth, the average speed of the particles increased periodically under different roof pressure conditions, and the height of cut coal has little influence on the dust generation process.