Abstract: Through the ＂3414＂ completely plan of field experiment, the best dosage of farmyard manure, nitrogen and phosphorus fertilizer applied in planting winter wheat in the south of Ningxia semi-arid gully area was discussed in this paper. Using shyfxExcel software analysis of the mathematical model of the winter wheat production target, it showed that nitrogen was the main factor restricting output. Preliminary concluded that gully area heilu soil （mengyuan heilu soil） of winter wheat yield was more than 300kg/667m2, the dosage of farmyard manure 2500kg/667m2, N11.6 666.7 kg/m2, P2Os10.4kg/667m2; When the maximum yield of 319.8kg/667m2, the dosage of farmyard manure 2900kg/667m2, N13.7kg/667m2, P20512. 4kg/667m2; when the best yield at 297.4kg/667m2, the dosage of farmyard manure 2000kg/667m2,N10.5kg/667m2,P2052.5kg/667m2;Nitrogen basal fertilizer and topdressing fertilized 50% each, farmyard manure should be widely applied in agricultural production in the future, and nitrogen and phosphorus fertilizer used should adjust to local conditions.