Before sowing seed potatoes, it is necessary to carry out seed potato treatment to accelerate germination-warm seed drying, which is carried out 30-40 days before sowing. The first step is to warm seeds to accelerate germination, and the temperature is required to be about 20 degrees, so that various enzymes of seed potatoes can be activated, nutrients can be decomposed, and buds can be quickly germinated and grown. It takes 10- 15 days until the terminal bud is 1 cm in size. Step 2: Sun-dry the seeds to grow strong buds. Put the warm-sprouted seed potatoes in the sun, and keep the low temperature of 15 degrees to make the buds green and strong for about 20 days.