Abstract: Mulching black loessial soil and terrance black loessial soil are the main soils for winter wheat production in eastern Gansu province.Unreasonable fertilization is an important reason for the winter wheat's low production efficiency.This study aims to examine a balanced fertilization model for winter wheat through field test, which can provide a theoretical basis for scientific fertilization of winter wheat in dry plateau of eastern Gansu.Choosing typical field of mulching black loessial soil and terrance black loessial soil, through fixed point "3414" test for two years, the optimum NPK application rates and the optimum combination on winter wheat in these two soils were investigated.The results showed:balanced fertilization mode of winter wheat in mulching black loessial soil was Y=23.98+20.44X₁-0.64X₁²+14.61X₂-0.07X₂²+86.88X₃-8.21X₃²-0.15X₁X₂-2.96X₁X₃-2.77X₂X₃, the best economic application rate was 149.9 kg·hm^-2 N, 82.1 kg·hm^-2 P₂O₅, 29.9 kg·hm^-2 K₂O, respectively; the balanced fertilization mode in terrance loessial soil was Y=208.25+5.87X₁-0.45X₁²-7.96X₂+0.26X₂²+12.69X₃+2.02X₃²+1.74X₁X₂-2.38X₁X₃-1.09X₂X₃, the best economic application rate was 107.0 kg·hm^-2 N, 70.5 kg·hm^-2 P₂O₅, 37.5 kg·hm^-2 K₂O, respectively.Potassium nutrient was rich, while nitrogen and phosphorus were lack in the soils of dry plateau of eastern Gansu.Nitrogen and phosphorus significantly improved winter wheat yield, and their interaction effects were also significant.Potassium had no significant effect on yield.