【Objectives】To learn the status and analyze the related factors of helicobacter pylori infections in children in Changsha,and provide theory basis for prevention.【Methods】1890 0 to 5-year-old children were randomly selected to make seroepidemiological investigation on helicobacter pylori infections,and questionnaire was used to understand the related factors【.Results】Helicobacter pylori infection rate for children aged 0~15 in Changsha was 20.4%,the percentages of infection for male and female were 18.4% and 21.9%,respectively.There has an irregular increasing trend of helicobacter pylori infection rate with the increasing of age,and the age group 13~15 years showed the highest infection rate.However,the infection rate of helicobacter pylori is decreased with the increasing of family income,but the rate was increasing in highest family income group.Hp infection rate of children whose parents have a history of gastric ulcer was significantly higher than children whose parents without a history of gastric ulcer.There have statistical differences.【Conclusions】Helicobacter pylori infection rates for children aged 0~15 in Changsha at the middle level,and Hp infection correlated to age,family income,family gastric ulcer.Helicobacter pylori infection was irregular increasing with the increasing of age and the decreasing of family income.Familial aggregation of Helicobacter pylori infection was shown in this study.