Abstract: Abstract: A surveay was made to investigate on different planting years topsoils(0～20cm) for vegetable greenhouse in Lishi region,and analyzed the soil accumulation characteristics indicators of the main physical and chemical property indicators and compared with the open field soils. The results show that the greenhouse soil pH were gradually reducing with the increasing planting years,and the range is 7.51～8.07.Currently,the problem of soil acidification is not serious. Electrical conductivity and pH are opposite trend,5 years of greenhouse soil Electrical conductivity (0.53 mS/cm) has exceeded the critical point of crop growth disorders (EC>0.50 mS/cm),20 years of greenhouse soil Electrical conductivity(1.03mS/cm) close to the critical point of cucumber growth disorders (1.2 mS/cm).Soil organic matter and available nutrient contents are increasing with the increasing planting years, the enrichment phenomenon of N、P、K is more obvious. When greenhouses were used to reach a certain age,soil organic matter,total Nitrogen and nutrient Nitrogen contents trend to stable state, their variation amplitude chang unobviously with the increasing planting years.