The invention discloses a planting method of selenium-rich millet. The method comprises the steps that 1, soil preparation and fertilization are carried out, wherein deep ploughing is carried out in autumn, harrowing and ridging are carried out after ploughing, and vibrating compaction is carried out in time after ridging; 2, seeds are treated, wherein the seeds are aired for 24 h before being sown, then added into a mixed solution to be soaked for 8 h at the temperature of 45-48 DEG C, and taken out to be dried in the air; 3, planting is carried out, wherein 0.65-0.7 kg of seeds are sown in each mu of land, the millet seed sowing depth is 3-4 cm, and the line spacing is 45 cm; 4, topdressing is carried out, wherein 45-50 kg of organic fertilizer is evenly spread in each mu of land in the booting stage 15 days before head sprouting; 5, harvesting is carried out, wherein harvesting is carried out after grains are completely yellow and hardened. By means of the planting method of selenium-rich millet, the millet yield can be obviously improved, lysine content, crude fat content and protein content are improved, particularly, the selenium content in millet can be remarkably improved, the amylase ratio is increased, and the nutrient and taste of millet are improved.