Peri-urban shelterbelt as an ecological infrastructure of the city that supplies safeguard for urban and its residents to obtain sustainable services provided by natural ecosystem. In this paper

we did quantitative analysis of the effects of Kokyar artificial afforestation project in peri-urban area of Aksu

a typical oases city in Sothern Xinjiang- on soil remediation and improvement. Soil samples of four main forest types(Apple

Jujube

Pear

Poplar forest) were selected as the research object

based on observation of the physical and chemical properties of the soil and its vertical distribution change

we made comparative study on the differences of soil physicochemical factors and their relationship under different forest types

in order to assess the improvement effect of shelterbelt forest construction on bare sandy soil. The results showed that:(1) Artificial afforestation project had a significant effect on improvement of physical structure of sandy soil by raising its soil moisture

reducing p H and soluble salt content and increasing soil organic matter and nutrient content;(2) The soil improvement effect of Jujube orchard forest was obvious. For soluble salt

lowest soil salinity were observed in Poplar forest stand while soil salinity of middle soil layer(10-30cm) within economic orchard forest was higher than the soil salinity top and bottom soil layers. It reflected that the "press salts" role of artificial irrigation;(3) Various forest types had different improvement effects on soil physical chemical properties. There was significant correlation between each soil factors. Soil quality after improvement was listed as: Apple > Jujube > Pear > Poplar Forest.