Abstract: In order to study on the nutrient released period with the soil moisture on released of nutrient from coated urea, this text studied coated material as the Idesia polycarpa var. vestita oil of the nature resources (to distillation from the fruit of tree) and preparation the coated-released-fertilizer, using the greenhouse experiment method, study on the imitation of dynamics process with the soil moisture and the nutrient released period on released of nutrient from coated urea and the temperature was kept at 25℃ in the pot. The results showed that, there were obvious effect of soil temperature and different soil moisture on the rate of nutrient released from coated urea with Idesia polycarpa var. vestita oil as coating material; the rate of nutrient released increase with increased of temperature and the rate of nutrient released increased with increased of rate of soil moisture and the accumulated nutrient released increased with increased of rate of soil moisture. There was obvious relation of line type with nutrient released period (d) and rate of soil moisture (w): d=287.8-3.53w, r=0.99.