Objective:To provide sound basis for scientific policy-making of the department in charge of hygiene,affirming the emphasis of the prevention of the diseases and rational distributing the resources of hygiene,and to present the preventive countermeasures. Methods: Through gathering,synthesizing and processing the data,the change of the proportionate mortality rate was analysed.The chart and table were described through using Office 2000.The trend of crude mortality rate was tested by Chi-squared test.Results: Since liberation,the crude mortality rate in the city and countryside had declined si...