Continuous cropping obstacles are caused by high-frequency continuous planting in medium and long-term protected vegetable fields, and the soil has problems such as decreased fertilizer supply capacity, nutrient imbalance, soil acidification and salt accumulation. In order to elucidate the changing law of soil physicochemical properties and fertilizer supply capacity of facility vegetable land with the planting years，typical facility vegetable land in Shenyang was taken as the research object，soil samples of the surface layer(0-20 cm)and sub-surface layer(20-40 cm)soil of the planting years 1-5，6-10，11-15，16-20 and 21-25 years were collected，the changing law of soil physicochemical properties and nutrient content with the planting years and the key influencing factors were analyzed. The results showed that as the planting years increased，the soil pH first decreased and then increased，which was significntly lower than the open field controe soil；the soil electrical conductivity showed the opposite trend. The contents of surface soil organic carbon，total nitrogen and alkaline hydrolyzable nitrogen increased to the maximum between 6-10 years，significantly increasing by 41.9%，160.9% and 747.6%，respectively，compared with the open field(P<0.05). When the planting years were 21-25 years，the contents of organic carbon，total nitrogen and alkaline hydrolyzable nitrogen dropped to the lowest. The soil available potassium content showed a downward trend with the increase of planting years，while the total phosphorus and available phosphorus contents first increased then decreased with the increase of planting years. The changing patterns of fertilizer supply capacity of subsurface soils were basically the same as the surface soil. In summary， it was suggested that during the cultivation process of facility vegetable field，the fertilization measures should be adjusted in a timely manner with the change of cultivation period，and the facility vegetable field with cultivation period of more than 10 years，phosphorus fertilizer should be reduced，nitrogen fertilizer and potassium fertilizer should be supplemented，and organic fertilizers should be gradually increased.