Abstract: In order to seek a rational installed form of the pick cutter for the coal shearer, the fatigue life of the pick cutter was analyzed and improved with the MG6 00 double drum coal shearer as a study object.The UG was aplied to establish the cutting drums of the MG600 coal shearer with 4 different cutting direction angles pic k cutters installed.The LS-DYNA was applied to the simulation on the coal cutting wall with four different cutting drums of the coal shearer.The cutting resistance diagra ms of the pick cutters were obtained.The cutting resistance data obtained could put into the MATLAB to get the mean value of the cutting resistance.In the UG/NASTRA N, the cutting resistance obtained from the MATLAB could load on the cutters with different cutting direction installed angles and could analyze the fatigue life.The study results showed that the pick cutter with a cutting direction installed angle of 45° would have the longest fatigue life and would not be easy to be broken.