A life-extending agent for hybrid Oryza sativa seeds, a preparation method therefor and an application thereof. The life-extending agent for hybrid Oryza sativa seeds is prepared by means of the following raw materials calculated according to mass percentage: moyeam extract 21.00-27.00%, bitter apricot kernel extract 17.00-25.00%, clove oil extract 5.00-10.00%, tea tree essential oil extract 10.00-15.00%, coumarin extract 17.50-22.50%, paclobutrazol 5.00-10.00%, agricultural streptomycin 72%, and a wettable powder 5.00-10.00%. The raw materials are weighed according to the foregoing proportions and are placed in a blending tank, being evenly stirred, and being packaged by means of composite aluminum bags or being canned so as to obtain the life-extending agent for hybrid Oryza sativa seeds.
