Abstract: The quadratics rotary orthogonal combination design was used to conduct field experiment of integrated balanced of yard manure, urea, calcium superphosphate, potassium chloride and potassium dihydrogen phosphate fertilizer in order to increase the yield of Chinese chestnut．Five quadratic regression mathematical models were established. Some conclusions were drawn from the model: Optimization fertilization program for increase the field of Chinese chestnut are applied yard manure 12.64~13.75 kg after harvest in fruit at previous year. Potassium dihydrogen phosphate 1.56%~1.77% on bearing base shoots of per tree was sprayed in April. Urea 0.27~0.29 kg, calcium superphosphate 0.35~0.40 kg, potassium chloride 0.21~0.23 kg to per tree were applied in July