Taking ‘Jinyou303’ cucumber as material，the effects of fill light on the plant growth，yield and quality of the winter-spring greenhouse cucumber were studied.The results showed that under conditions of fill light，plant height，stem diameter，fruit weight increased，yield increased 12.5% per 667 m2，net output increased 8.4% and the quality of cucumber was improved significantly compared with the control group.Especially in the face of continuous cloudy，fill light cultivation group showed strong resistance to disease and strong ability to increase production.