Abstract: Objective To explore the prevalent characteristics of malignant tumor in Jiading District.Methods The cancer registry data of 1996-2001 and 2002-2006 were classified according to ICD-9 and ICD-10, respectively, and all data were analyzed retrospectively.Results 0ver the 11 years, the crude incidence of cancers was 285.23 per 100, 000 and the standard incidence ratio was 176.25 per 100, 000.The crude incidence of males and females were 332.20 per 100, 000 and 238.99 per 100, 000, respectively.The incidence ratio between males and females was 1.37:1.The incidence of cancers increased remarkably after the age of 45 years.Lung cancer, stomach cancer, colorectal cancer, liver cancer and breast cancer were the top 5 of all cancers in Jiading District.Conclusion The incidence of malignant tumor showed an increasing tendency in Jiading District during the past 11 years.Hereafter the key to cancer prevention and control should be popularizing knowledge of cancer prevention and giving priority to early detection and treatment in high-risk population.