Abstract:A twodimensional cutting simulation model of highspeed cutting AF1410 highstrength steel is established by using the ABAQUS finite element analysis software.Then，the cutting process is simulated，the stress change and distribution during cutting are obtained，and the influence of cutting parameters on cutting force is analyzed.The studies have shown that after the tool cuts into the workpiece，the magnitude and direction of the shear stress remain almost unchanged and the shear angle is about 45°，and the shear angle becomes negative when the tool is about to cut out the workpiece.The material of the cutting layer slides and deforms in the direction of a negative shear angle of about -20° and forms residual plastic deformation at the cutout end.The cutting force Fx increases with the increase of cutting speed and cutting depth，where the influence of cutting depth on Fx is greater than that of cutting speed，but the effect of cutting speed and cutting depth on Fy is small.