The invention discloses a rice seedling growing tray which is prepared according to the method comprising the following steps: (1) dosing plant straws, chicken manure, bean pulp, shrimp shells, diatomite, zeolite powder, weathering coral, 25-35 parts of black false hellebore, rheum officinale, fructus kochiae, polygonum cuspidatum, carpesium abrotanoides, Bupleurum scorzonerifolium, Hedyotis biflora, castor bean, pokeberry root, rhizome of dryopteris, rhizoma galangae, loquat root, aspongopus and scirpus maritimus; (2) fermenting the plant straws, chicken manure, bean pulp and shrimp shells; (3) sintering the weathering coral; (4) dissolving the sintered substance in water, mixing with zeolite powder, and irradiating by using far infrared rays; (5) decocting the traditional Chinese medicines to obtain the filtrate; (6) soaking the diatomite in the decocted filtrate; (7) uniformly mixing the materials obtained in the previous steps; and (8) performing compression molding. According to the seedling growing tray, the rice yield can be improved, the plant diseases and insect pests are controlled, and the ratio of lysine in proteins can be improved, so that the quality and taste of the rice are improved.