Abstract: Solid modeling of impact crusher was made. The crusher working process was emulated by using LS-DYNA, the motion track of materials in the crushing process was computed and the  track curves of materials at different project angles, impact points and particle sizes were analyzed for determining the sectional profile curve of the counter-board. The results provide a basis for the design and improvement of impact crusher structure.

Key words: Impact crusher, Impact plate, Finite element, LS-DYNA