Abstract: In order to study the geographic distribution of haemorrhagic fever with Renal Syndrome (HFRS),and the function of correlative factors on this disease, the data of HFRS incidence in Longquan City during 1991-1995 was anaiysed.The results showed that the annual incidence rate was 34.67/10 5 in these five years.There were 31 epidemic areas of HFRS among 43 towns and townships.The population of exposure was 215811,about 80.56% of the total population in the city.Cases of HFRS cccured sporadically and less discover-ing of two patients in a family.But the distribution had a obviously clustering among the townships.The incidence rate showed a negative correlation with the elevation or the area of moodland,and a posivive correlation with the cultivated are.The cases of HFRS was about 1.2 to 2.2 kilometres per year in the complicated natural conditions.It was concluded that Longquqn city was a strong,mixed-type epidemic area of HFRS,the main infectious source was Apodemus agrarius and also concluded that the incidence rate was closely related with the environment and the climate.