Most precision seeders can sow a variety of crops. By replacing the seed metering disc (wheel) or the seed metering drum with different apertures, the seed metering device can meet the sowing requirements of various crops. Change the size of the hole or increase the hole-forming mechanism to meet the requirements of hole sowing; Changing the working speed of the seed metering device to meet the requirements of different plant spacing, all of which improve the universality of the seeder.