Oat is a nutritious healthy food.Interplant oat with seedless watermelon can use sunlight effectively and promote revive of watermelon seedlings.It can increase land utilization and economic efficiency.Cultivation techniques of interplant oat with watermelon were studied in this experiment and a set of high-yield cultivation techniques formed.It has a good technical guidance for oat cultivation and widespread in Anshan City,Liaoning Province.