This report applied a new equipment named “A Type of Device for Automatic Control of Soil Water Potential”,to the movement of water through indoor simulation tests in soil columns under different negative pressure to determine the suitable negative pressure value for cucumber.The potted plant experiment of insitu field in condition of artificial rain proof was carried out to investigate the effects of different fertilizers and different irrigation conditions on the yield and quality of cucumber.Indoor soil column experiment was designed by four pressure levels(0,5,10 and 15 kPa).Six treatments was conducted to study the effects of different fertilizers on the yield and quality of cucumber including T1(Conventional irrigation,N∶P2O5∶K2O=1∶0.7∶1),T2(Negative pressure irrigation,N∶P2O5∶K2O=1∶0.7∶1),T3(N∶P2O5∶K2O=1∶0.7∶1.2),T4(N∶P2O5∶K2O=0.9∶0.7∶1+DCD+HQ),T5(N∶P2O5∶K2O=0.8∶0.7∶1+DCD+HQ),T6(N∶P2O5∶K2O=0.7∶0.7∶1+DCD+HQ ).Soil samples and cucumber samples were collected to test yield,quality,nutrient absorption.The results showed that in the range of-5~-10 kPa,and the soil moisture of 15.83%~21.63%,the cucumber had the optimal growth condition.Under the negative pressure of(-5±1）kPa,T2 significantly increased the yield of cucumber by 3.24 times compared with T1.T3 significantly increased the yield of cucumber by 51.1% compared with T2.T3 increased the content of vitamin C,soluble sugar,and decreased the content of nitrate by19.8%.T4,T5 and T6 maintained the yield of cucumber,compared with T2.T4 increased the content of the soluble sugar by 367%,and decreased the content of nitrate by 34% compared with T2.Under the negative pressure of(-5±1）kPa,T3 increased the yield,and improved the quality of cucumber.T4 maintained the yield and increased the quality,which provided a scientific basis for the reduction of the environmental pollution caused by chemical fertilizer application.