Abstract: Aimed at the phenomena of tillage claw arching soil and the whole machine shaking in the course of experimentation for the first-generation prototype, the moving trajectory of the tillage claws was studied and the causes for the phenomenon of soil being arched were found out. Structure of the claw scarifier was improved, based on discussion on the movement disciplinarian of the tillage claws, the key structural parameters that influenced its performance were found out, and were set as variables. In the environment of ADAMS system, virtual model was built and kinematics simulation experiments were done. Through analysis on the simulation results, technical parameters of the prototype were optimized, and second-generation prototype was made while experiments were done. The results showed that the second-generation prototype overcame effectively the problem of the machine shaking because of claws arching soil, and all other indicators reached the technical requirements of tillage equipment.