Cultivation technique for three high and one safe of double harvest rice

The invention relates to a cultivation technique for three high and one safe of double harvest rice, comprising the following steps: before sowing, sprout cultivation fertilizer of the invention is used as basic fertilizer and spread at one time, the usage amount is 30-75g/m seedling bed, early rice with 3-4 leaf age and late rice with 5-6 leaf age are transplanted to big field at proper time; a method of broad row spacing and narrow planting distance is adopted, the row spacing is 27-30cm, and the planting distance is 13-17cm; 12-14 kilograms of chemical nitrogenous fertilizer is spread on each mu in the planting, when the number of plant reaches 70%-90% of the planned spike number, drainage and field drying are carried out, then slight drying is carried out for three to four times, water is regained in the leaf sprouting period of the second leave from the top; rice tillering-control agent containing gibberellin is spread in the critical leaf age period of the effective tillering; and the agent is spread on