The Qing-ling machine is the cleaning part of Comb-type cotton picker. Its working performance directly affects the complete machine efficiency. In order to improve popularizing rate of Comb-type cotton picker, combining with the cotton varieties, the plant characteristics, climatic conditions and the harvests requirements in Xinjiang, the reasonable structures, transmission system and design parameters of Qing-ling machine are put forward. Virtual prototypes of key components are set up under Pro/E. the kinetic simulation data are obtained by using ADAMS. Simulation results prove design correctness and provide relevant data for further research.