In order to provide a theoretical and data support for improving the soil quality of drip irrigation wheat field，a 2-year field experiment was conducted in the northern piedmonts of Tianshan area to investigate the effect of different green manures on the main fertility properties of wheat field soil.Two green manure treatments and fallow control(DD:soybean，YK:sunflower，XX:fallow control)were set up under three fertilization methods(CK:no fertilizers，CF:conventional application of nitrogen and phosphorus fertilizers，OF:20% mineral fertilizers replaced by organic fertilizers.These treatments had been going on for 3 years)，the plant dry matter，nutrient accumulation and soil physical and chemical properties were measured at 20，40 and 60 days of the green manure growth.The results showed that the yield of green manure in different treatments in 2020 and 2021 was the highest in OF treatment，and the biomass of the two green manures showed YK>DD.In 2021，the biomass of OF-YK was 68.2 t·hm-2，and the accumulation of N，P and K in shoot was 200.6，64.5 and 340.9 kg·hm-2，respectively.Soil available nitrogen content increased by 15.1% at OF-DD harvest stage，and soil available potassium content increased by 6.5% at OF-YK harvest stage.The soil water content of different green manure treatments showed green manure>fallow for both years；the organic carbon(SOC)and total nitrogen(TN)contents of different fertilization treatments all showed OF>CF>CK，and the SOC of different green manure treatments showed YK>DD>XX ，TN performance was:DD>YK>XX.Compared with 2020，the SOC of XX treatment in 2021 reduced by 2.6%，and the TN reduced by 6.9%.Compared with 2020，the SOC of OF treatment in 2021 increased by 5.9%，and the TN of DD increased by 1.22%.In conclusion，Soybean and sunflower returning to the field can effectively improve soil moisture conditions，increase soil total nitrogen，organic carbon，soil available nitrogen，and available potassium content；it has the function of fertilizing the soil and increasing the soil organic carbon content；multiple cropping of soybean has the potential to improve farmland ecology by reducing nitrogen application.20% of mineral fertilizer replaced by organic fertilizer combined with sunflower green fertilizer can increase soil carbon content and improve soil fertility.