By taking Cixi City as the research area and making location fixed sampling and typical area sampling,the six soil physicochemical properties of organic matter,total nitrogen,available phosphorus,availab1e potassium,conductivity and pH value were selected to analyze characteristics of the temporal and spatial variability of soil quality and discuss the main influence factors on the abundant materials.Results show that soil quality in Cixi City was declining over the past three decades.The single indictors of total nitrogen,available potassium,pH value and organic matter decreased by 1.03,0.46,0.33 and 0.18 and the single indictors of available phosphorus and conductivity increased by 0.5 and 0.42,respectively.The comprehensive indicator of soil quality was reduced by 0.28.The loss of total nitrogen was severe.Spatially,soil quality decreased gradually from north to south and the comprehensive indicator of soil quality was 1.36,1.35,1.43 and 1.18,respectively.The cropping patterns,time length of land reclamation and soil management were the three main factors that influence soil quality.