Nowadays, the corn harvester has a variety of forms, including horizontal, vertical, and combinational pick roller, etc.New maize Corn harvester with 9-line designed in this paper, the header using the horizontal pick roller.In this paper, cutting machine is designed for spacing can be adjusted, cut folding machine, the structure of the whole machine will have a big change, for this machine with large 9-line , is a new breakthrough on the structure.