Abstract: Objective The present study was made to explore the threat towards people's health caused by communicable diseases in different decades．Methods Thorough analysis was conduct-ed on the dynamic tracks of communicable diseases in Yichun City from 1950 to 2005．Results The whole tendency of the incidence of communicable diseases presented dramatic and wavelike decrease．The incidence decreased by 96.05％ and mortality decreased by 95.67％．The compo-nents of communicable diseases mapping were mainly those diseases caused by natural infectious sources．Arbo-diseases and communicable diseases from 1950s to 1970s．And in 1990s，intestinal communicable diseases became the major component，while at the beginning of 21st century，respi-ratory communicable disease．Intestinal communicable disease．Blood communicable disease and STD became the three major components．Those extremely threatening the health and life of chil—dren have been eliminated and con仃oiled．The incidences of viral hepatitis and pulmonary tubercu．10sis increased relatively fast．And the epidemic situation of AIDS was very serious and the epi-demic situation of rabies disease increased retrospectively，which had become the entity causing the most death cases．Conclusion The outlook in prevention and control of communicable diseases in Yichun City iS still serious at present．And prevention and control of communicable disease will still be the key point in disease control in this City for a long time．