NOVELTY - Cultivating organic selenium-rich rice comprises sun-drying the seeds, soaking the sun dried seeds in effective microorganism (EM) raw liquid, disinfecting, allowing the seeds to absorb enough moisture required for germination, and sowing uniformly germinated seeds; transplanting 15-20 days old strong pest-free seedlings, having 3-4 leaves, thick stalk, green ting color, multicolor root and stocky plants; spraying 500-1000 times of EM raw liquid, and tilling; when the transplanted seedlings turning green, spraying EM raw liquid on foliage top.    USE - The method is useful for cultivating organic selenium-rich rice (claimed).    ADVANTAGE - The method has simple operation, produces high yield, is environmentally-friendly, protects Cordyceps sinensis from disease, and produces puffed rice with high quality, thus ensuring high safety for consumption.    DETAILED DESCRIPTION - Cultivating organic selenium-rich rice comprises (i) mixing effective micro-organism (EM) raw liquid, brown sugar or molasses and water in the mass ratio of 1: 1:100-200, closed-culturing for 48-72 hours to obtain mother liquor, mixing the mother liquor and organic fermented material in the mass ratio of 1:4.9-4.95, adjusting the moisture content, and fermenting under sealed condition for 4-10 days to obtain EM fermented organic fertilizer, where the organic fermentation material includes organic waste and 20-25% rapeseed cake or crushed soybean; (ii) uniformly mixing silicon fertilizer and fine dry soil in the mass ratio of 1:4-5, adding EM organic fermented fertilizer, evenly mixing to obtain basal fertilizer, where the adding amount of fertilizer is 6-12 kg/acre, the EM organic fermented fertilizer amount is 100-500 kg, 10-15 days prior to tilling, adding the basal fertilizer on the field, uniformly plowing to 10-20 cm; prior to applying basal fertilizer, removing the weed, and clearing the crop residues and diseases and insect pests; (iii) sun-drying the seeds for 1-2 days, turning 3-4 times a day, soaking the sun dried seeds in 100-300 times of EM raw liquid, disinfecting, allowing the seeds to absorb enough moisture required for germination, and sowing uniformly germinated seeds, where the seeding rate is 2.5-3 kg/667 m2; where, prior to sowing, preparing seedling land, applying chicken manure on the land, composting 90-110 kg, paving and sowing; (iv) in the seedling growth process, using 500-800-times diluted EM raw liquid as weaning fertilizer and wedding fertilizer, spraying weaning fertilizer on 1 pin to 2-leaf stage, and spraying wedding fertilizer one day prior to transplanting the seedlings, where the weaning fertilizer and wedding fertilizer are sprayed on both sides of the blade, until the leaves are wet; (v) transplanting 15-20 days old strong pest-free seedlings, having 3-4 leaves, thick stalk, green ting color, multicolor root and stocky plants; spraying 500-1000 times of EM raw liquid, and tilling; (vi) soaking the seedling root in 400-800 times diluted EM raw liquid for 3-5 minutes, and transplanting; (vii) when the transplanted seedlings turning green, sprinkling 60-120 kg/667 m2 rice bran between the rice paddies, until the rice bran is submerged 2-4 cm below the shallow water, so as to fully cover the paddy rice for 6-8 days; and (viii) when the transplanted seedlings turning green, spraying 250-800 times EM raw liquid on foliage top every 7-10 days, where the spraying amount is 50-70 kg/667 m2, spraying times is 3-5 times.