The invention discloses an efficient nitrogen fertilizer application method for double-cropping super-rice nitrogen backward ear strengthening, relates to the technical field of crop cultivation, andsolves the problems that according to growth of existing rice, early nitrogen is surplus, nutrients are wasted, and supply of later nitrogen is insufficient. The technical scheme includes that the method includes the steps: selecting varieties of double-cropping super-rice; determining total application amount of N, P and K fertilizers. The application ratio of early super-rice base fertilizers, tillering fertilizers, ear fertilizers and granular N fertilizers is 6:3:1:0, 5:3:2:0 or 5:3:1:1, the application ratio of late super-rice base fertilizers, tillering fertilizers, ear fertilizers and granular N fertilizers is 5:4:1:0 or 5:3:2:0 or 5:3:1:1, the P fertilizers completely serve as base fertilizers to be applied, 60% of K fertilizers serve as base fertilizers to be applied, 40% of K fertilizers serve as ear fertilizers to be applied, the method has the functions of improving fertilizer utilization efficiency, facilitating collaborative development of ear grains of the super-rice andrealizing yield-increasing potential of the super-rice, and technical support is provided for green and efficient development of rice industry.