Corn and soybean composite seeding machine

The utility model relates to agricultural machinery, in particular to a corn and soybean composite seeder. Comprising a machine frame, a fertilizing device, a fertilizing and ditching device, a corn seeding device, a soybean seeding device and a main transmission device, the fertilizing device is fixed to the middle of the top of the machine frame, the fertilizing and ditching device is located under the fertilizing device, and the corn seeding device and the soybean seeding device are both located behind the fertilizing device. The corn seeding devices are located on the left side and the right side of the rack, a plurality of soybean seeding devices which are arranged at intervals in the width direction of the rack are arranged between the corn seeding devices on the two sides, and the fertilizing device and the soybean seeding devices are in transmission connection with the main transmission device. The whole machine is coordinated, the requirement for planting row spacing of soybeans and corn is met, turn