Abstract: Harvesting whole stalk by mechanization, as an important link of comprehensive exploitation and utilization for corn straws, can improve their recovery efficiency, and reduce their recovery cost. Based on the existing corn harvest mechanization techniques, a stacking mechanism for corn straws on combine was developed, corn stalks were cut off and paved on line by a milling cutter, a screw conveyor and a group of pressure delivery devices etc., and then they were collected into stack by a hay rake which was installed on the back of the combine. Mechanical-electrical-liquid technique was adopted on the hay rake, operator could easily change the distance of corn straw stacks through adjusting knobs, and could easily start or stop working process through operating corresponding buttons. Experiment results showed that the stacking mechanism for corn straws on combine worked safely and reliably, and its atuomatic control system ran accurately and efficiently, the efficiency of whole stalk harvest increased more than 50% compared with traditional way. The system provides conditions for the recovery and efficient ecological use of corn straw.