The invention discloses a simplified rice nitrogen application method based on quick-acting nitrogen fertilizer. The method comprises steps as follows: nitrogen fertilizer is divided into base fertilizer or tillering fertilizer and earing fertilizer and applied twice, the application ratio is 4:6, the base fertilizer is applied before transplanting of transplanting rice, the tillering fertilizer is applied at four-five-leaf stage of direct sowing rice, and the earing fertilizer is applied at the primary branch differentiation stage of young ears of the transplanting rice and the direct sowingrice. Compared with a frequently-used nitrogen application method for farmers, the simplified rice nitrogen application method has the advantages that total amount of the nitrogen fertilizer, yield and utilization rate of the nitrogen fertilizer have no significant difference, but the fertilizer application is reduced by 1-2 times, labor and cost are saved, and the method is simple to operate andeasily accepted by massive rice farmers.