In order to reasonably evaluate the effect of fertilizer recommendation method of Nutrient Expert (NE)System on Zhangqiu green onion，field experiments were conducted in Zhangqiu to study the effects on yield，economic benefit，nutrient accumulation，fertilizer use efficiency and soil nitrate accumulation of fertilization recommended by NE，soil testing from the local agricultural technical department (OPTs) and farmers’ practices (FP). The results showed that NE recommendation reduced nitrogen，phosphorus and potassium application rate by 13.22%，27.33% and 16.51%，respectively than FP treatment. Compared with the OPTs treatment，NE recommendation increased nitrogen and phosphorus fertilizer input but reduced potassium input. Nutrient expert recommended fertilization for green onion increased the yield by 6.04% and 12.30%，and economic benefit by 8.01% and 14.74%，respectively，compared with the FP and OPTs treatments. Nitrogen and potassium accumulation of NE treatment significantly increased by 14.20%，37.78% and 16.78%，22.13%，respectively，compared with the FP and OPTs treatments. Meanwhile，phosphorus accumulation of NE treatment increased by 21.22% and 25.78%，which had no significant differences.The average agronomic efficiency of NE treatment was 71.78 kg/kg，and fertilizer use efficiency was 25.10%. The partial factor productivity of nitrogen fertilizer in NE treatment was 22.22% higher than FP treatment. Compared with FP and OPTs，NE nitrate nitrogen accumulation significantly reduced by 39.44% and 38.72% in 0～90 cm soil profile. Nutrient expert recommend fertilization for green onion could promote the absorption and accumulation of nitrogen，phosphorus and potassium of green onion，improve yield，income as well as nitrogen fertilizer use efficiency，and decrease risk of soil nitrate accumulation. This nutrient expert recommend fertilization for green onion is worthy of popularization and application.