Objectives To search for the relationship between HP and lesions of gastric mucosa of children.Methods Four hundred and fifty-eight bioptic specimens-from eastrie mueosa in children were strained with hematoxylin-eosin(HE)and Warthin-Starry for light microscopic study.Results HP was detected in 152 specimens. HP deteetable rate-in specimens with normal mucosa was 1. 1%, in compari-on with 42.3% in those with chronic superficial gastritis and 14. 3% in those with chronic atrophic gastrins .Specimens with chronic active gastritls, mostry manitesting local active lesions,had HP detectable rate of as high as 80.2%、69. 7% of the specimene with HP were found to have obvious lymph follicles reaction within lamina propria in their gastric mucosa.Conclusions There is a close relationship between HP infection and Pediatric chronic gastritis(especially chronic active gastritis). Histopathologically, HP-associated gastritis is characterized by chronic and local active inflamations, and tbe formation of lymph follicles within lamina propria.