After the new seeds are harvested in the fall, they need to be air-dried and then re-entered. In doing so, one can reduce the moisture content of seeds, prevent worms and mildew, and enhance the safety during storage; second, it can promote post-harvest, enhance the vitality of seeds, increase the germination potential and germination rate, and help increase the yield of strong seedlings. According to the experiment, the corn of the same variety has a germination rate 10%-20% higher than the non-sunburned one after harvest, and the third is that it can kill germs. Ultraviolet rays in the sun can kill certain pathogens that adhere to the surface of the seeds. Sowing is an important measure for preventing disease and increasing crop production. When drying, select sunny days to evenly spread the seeds on the drying floor (note that they cannot be directly spread on asphalt or cement drying yards to prevent the seeds from being burned due to excessive temperature). The thickness should be 5-10 cm, and it should be turned during the day. Pile up and cover at night, generally even dry for 3-5 days.