NOVELTY - Standardization of organic selenium-rich rice planting includes selecting hybrid rice or conventional rice varieties, clearing the land, land leveling, and providing ditch, and mechanically or artificially sowing hybrid rice, conventional indica rice, conventional japonica rice, and upland rice, where 1-2 days before sowing, rice seeds are first soaked in seed soaking agent comprising water, selenium yeast, purple sweet potato anthocyanin, sodium selenite, tea alkaloids, cypermethrin, mulberry leaves, sodium nitrophenolate, citric acid, chelated zinc, chelated iron and urea.    USE - Standardization of organic selenium-rich rice planting.    ADVANTAGE - The method provides selenium-rich rice having organic selenium content of more than 0.10 mg/kg, which is more than 80% organic selenium content, meeting the selenium-enriched rice national standard of GB/T22499-2008.    DETAILED DESCRIPTION - Standardization of organic selenium-rich rice planting comprises selecting varieties (hybrid rice or conventional rice) having growth period of 135 days, high-yield and high-quality, sowing seeds in early June or June 20 as the latest, clearing the land, land leveling, and providing ditch of 4 m wide, mechanically or artificially sowing 2.5 kg hybrid rice, 6-8 kg conventional indica rice, 8-10 kg conventional japonica rice, and 8-10 kg upland rice per mu, where 1-2 days before sowing, rice seeds are first soaked in seed soaking agent comprising 100 pts. wt. water, 10 pts. wt. selenium yeast, 10 pts. wt. purple sweet potato anthocyanin, 5 pts. wt. sodium selenite, 1 pt. wt. tea alkaloids, 2 pts. wt. cypermethrin, 2 pts. wt. mulberry leaves, 2 pts. wt. sodium nitrophenolate, 2 pts. wt. citric acid, 2 pts. wt. chelated zinc, 2 pts. wt. chelated iron and 3 pts. wt. urea, applying 20 kg selenium nutritional agent/mu, where selenium nutritional agent comprises 5 pts. wt. pit mud, 5 pts. wt. sea mud, 5 pts. wt. biogas, 5 pts. wt. cigarette ash, 5 pts. wt. sodium selenite, 1 pt. wt. seedling agent, 20 pts. wt. ternary compound fertilizer, 5 pts. wt. pepper leaf ash, 5 pts. wt. selenium-enriched yeast, 2 pts. wt. urea, 1 pt. wt. chicken bones, 2 pts. wt. bamboo powder, 2 pts. wt. tea, 5 pts. wt. purple potato starch and 5 pts. wt. selenium-rich tea leaves, weeding, preventing insects and disease, and timely harvesting more than 90% ripe rice grain.