Abstract: In order to reveal the agricultural measures affecting the occurrence of sunflower Sclerotinia sclerotiorum.The relationship between different sowing date,different planting density and different amount of fertilizer application and the occurrence of sunflower seedling rot and disc rot were studied,and the agricultural management measures and suggestions were put forward.The results showed that no matter the varieties were resistant or not,late sowing could reduce the harm of Sclerotinia sclerotiorum.The higher the planting density of sunflower,the more serious the incidence of Sclerotinia sclerotiorum.With the increase of N fertilizer dosage,the number of ascorbic discs and disease index increased.The increase of P and K fertilizer had little effect on the disease index.Therefore,delayed sowing for 10 days,planting spacing of 70 cm,and increasing the amount of P fertilizer by 40 kg·hm^-2 or increasing the amount of K fertilizer by 90 kg·hm^-2 could reduce the occurrence of Sclerotinia sclerotiorumand increase the yield of sunflower,which could provide a certain research basis for the control of Sclerotinia sclerotiorum in Heilongjiang Province.