Abstract: According to the problems of different stressed cutter in different cutting depth occurred from the identical type cutter and same installed angle layout ap plied to the present vane of the cutting drums for the coal shearers, in references to the establishment process of the Evans.I coal cutting model with the pick cutters, in combination with the actual conditions of the coal and rock mining, based on the comprehensive consideration of the coal and rock pressed effect, coal wall inclination and the cutter installed angle, with the mechanics analysis of the coal cutting process, a mathematic model was established and a simulation study was conducted on th e model. The simulation results showed that within the cutting depth ranging from 01.1 m, with the cutting depth increased, the half cone angle would be in linear ina re duced tendency and the installed angle would be in noninear in a reduced tendency. The variation scope and the variation tendency would have a certain relationship wi th the seam geological condition.The study would provide theoretical basis to the layout of the cutter installation at different cutting depth.