A simplified fertilizing method allowing high yields of triple cropping direct seeding rape in red earth rice fields is simplified. The method is characterized in that the fertilizing amount for the triple cropping direct seeding rape in high yields in the red earth rice fields is made accurate and includes 10-12 kg of N, 4-5 kg of P2O5, 5-6 kg of K2O and 1.0 kg of borax per mu and the N, the P2O5, the K2O and the borax are applied in two times. Compared with the prior art, the method is advantageous in that double-cropping rice production is ensured and high yields of triple cropping direct seeding rape in winter fallow fields are ensured, the high yields are achieved to increase income, and production of triple cropping direct seeding rape can be restored with actual effects. In addition, according to the method, annual nutrient requirements of a rice-rice-rape rotation pattern are integrated by the fertilizing technique, the fertilizing amount is made accurate, the number of times of fertilization is reduced, the fertilizer utilization rate by the rape is increased, labor demand is reduced, the rape production cost is saved, labor intensity of rape production is reduced, a trend of simplifying rape production is met, and production of the disappeared triple cropping direct seeding rape can be rapidly restored.