NOVELTY - Method for producing selenium-rich rice, involves uniformly scattering biological organic selenium-rich ecological fertilizer in field at one time during plowing the field.    USE - The method is useful for producing green selenium-rich nutritional rice. Method for preparing the biological organic selenium-enriched ecological fertilizer (all claimed).    ADVANTAGE - The method enables preparation of fertilizer is simple, convenient, saves time, and increases rice photosynthesis, drought resistance and insect pests resistance, improves yield and quality of the rice. The prepared rice is nutritious, green and environment-friendly and not polluted by pesticide, and does not contain any hormone or chemically synthesized auxin, and produces selenium in an amount of 0.16-0.22 mg/kg, and prolongs the life by long-term eating.    DETAILED DESCRIPTION - Method for producing selenium-rich rice, involves uniformly scattering biological organic selenium-rich ecological fertilizer in field at one time during plowing the field, where biological organic selenium-rich ecological fertilizer comprises (in wt.%): fresh milk vetch (20), calcium magnesium-phosphor (8), calcium superphosphate (8), medical stone (5), zeolite (5), potassium feldspar (5), tung cake (8), rapeseed cake (8), potassium sulfate (4), ferrous sulfate (1), zinc sulfate (1.5), magnesium sulfate (1), manganese sulfate (1), sodium metasilicate (2), crushed sodium (2), copper sulfate (1), sand (2), molybdate (0.4), gasification rare earth (2), soil pixel activating agent (2), and water (remainder), and the total amount of raw material is 100. An INDEPENDENT CLAIM is included for method for preparing the biological organic selenium-enriched ecological fertilizer, which involves uniformly mixing the above-cited raw materials to obtain pile, uniformly collecting piles of 200-300 kg in small heap, and covering the heap with plastic film mulching to hold moisture, and fermenting at room temperature for 15-20 days, where the dosage of fertilizer is 15 mu/kg.