To investigate the effects of phosphate fertilizer reduction and zinc fertilizer application on the yield and quality of Guanxi pomelo in Pinghe County, the white flesh Guanxi pomelo in Pinghe area was used as the test material, and six treatments were set up including: 70% reduction in phosphorus combined without zinc fertilizer, 70% reduction in phosphorus combined with zinc fertilizer, 35% reduction in phosphorus combined without zinc fertilizer, 35% reduction in phosphorus combined with zinc fertilizer, the habitual amount of phosphorus combined without zinc fertilizer, the habitual amount of phosphorus combined with zinc fertilizer. Results showed that reducing the amount of phosphate fertilizer can increase fruit yield and improve fruit quality. When phosphate fertilizer is reduced by 35%, the fruit yield will increase significantly, and it can significantly reduce the weight of single fruit and thick skin, increase vitamin C, solid-acid ratio and other indicators; 35% reduction in phosphorus combined with zinc fertilizer can significantly increase fruit yield, comprehensive quality score, fruit juice rate, water content and vitamin C content. Field test results showed that Phosphate fertilizer can be reduced by 35% in Pinghe Guanxi pomelo orchard., Phosphate fertilizer reduction by 35% combined with zinc fertilizer can significantly increase yield and improve fruit quality, it was phosphate fertilizer (P2O5) 0.85 kg/(plant·a), two sprays of 0.2% zinc fertilizer (ZnSO4·7H2O) 40 g/( plant·a).