An orthogonal quadratic regression rotation combinatorial design with 4 factors, i.e.nitrogen(N), phosphor (P), potassium(K), and boron(B), was adopted in field experiments.Fert ilization models were built up and analysed for yield, oil content, oil yield and protein of yellow-seeded rape.The single factor effect analysis shows that in terms of effect of fertilization on seed yield and oil yield, the four single factor fertilizers were in the order of X₁(N)>X₂(P₂O₅)>X₄(B)>X₃(K₂O); while in terms of effect on oil content and protein, they were in the order of X₁ (N) > X₄ (B) > X₂ (P₂O₅)>X₃(K₂O) and X₁ (N)>X₄(B)>X₃(K₂O)>X₂(P₂O₅), respectively.Based on the fert ilization models for oil yield and protein, in order to get an oil yield higher than 1 000 kg hm^-2 and a protein content higher than 40% in the rapeseed cakes, the optimum fertilization rate should be recommended as N 163.7~179.2 kg, P₂O₅ 85.0~95.0 kg, K₂O 100.7~124.3 kg and B 6.7~8.3 kg per hm²; and to get a protein content higher than 45%, the fertilization rate as N 236.6~255.4 kg, P₂O₅ 80.3~ 99.7 kg, K₂O 103.2~126.8 kg, and B 8.9~ 10.3 kg per hm².