Aiming at the problems of the blade wear too fast and the workpiece cross section burr in the sawing process of producing H steel by the clod sawing machine，the DEFORM3D finite element simulation software is used. The process of saw cutting H steel was simulated, and the sawing blade rotational speed, feed rate and saw cutting position in simulation process were changed. Through the sawing force changes, the most reasonable sawing technics parameters were found out, which improve production efficiency, inhibite burr producing, and prolong the service life of the saw blade.