Study objectives: l/ Describe epidemiological and clinical factors of hemorrhage dengue fever and describe vector indexes. 2/ Analyse factors related to clinical symptoms and lab-confirmation posi~ve with dengue fever. Methodology: A cross-sectional and retropective study was conducted on the sample of 495 patients. Analyse vector indexes, evaluate result of lab-confirmation test. Using software of Ecxell and SPSS for analysis data. Results: During of 5 years there were 495 patients in hold Quang Tri province. The patients increase every year. Months with high patients were from July to November. Male: 48.9 percent, femal: 51.1 percent. Epidemic occur in all districts of province. Aedes aegypti was main vector. There was relation between communicable vector and number of patients. Positive rate with Mac Elisa was 40.7 percent, with NS1 was 82.43 percent. Type of common virus was Dengue. Type of virus Dengue II was discovered in year 2010. Clinical symptoms was typical of hemorrhage dengue fever. Common symptoms were fever, heahache, bodyache, join pain, eyehold pain. Patients with degree I and II were 83.03 percent, with degree III were 1.62 percent. There was the statistical significance between days of fever with garo sign, with hemorrhage spot, with level of fever, with labconfirmation positive test.