To analyze the Zhoushan residents atrophic gastritis risk factors.Gender,age,4 327 cases of atrophic gastritis HP infection,the degree of intestinal metaplasia,accompanied by dysplasia were analyzed.The result showed that atrophic gastritis incidence of male and female ratio 1:3;atrophy sex gastritis high risk age group in turn was 60 years of age group 40 years of age group 70 years of age group;intestinal metaplasia and high fat for 50 years of age group 60 years of age group 40 years of age group;HP infection male to female ratio 1:2.6;characteristics of the age of 50 years of age group 30 years of age group 40 years group;high incidence ages 30-39 years old atrophic gastritis with mild dysplasia,moderate dysplasia to high incidence of age 50-59.The island residents atrophic gastritis in women higher than men atrophic gastritis of the young people with more than mild dysplasia,was due to the high incidence of atrophic gastritis and diet,environment,gender and young people,HP infection was accompanied by related risk factors such as epithelial dysplasia.