Abstract: 1 667 children of 3 to 6 years old were inspected randomly in kindergartens of Hangzhou from April to June 2006. Enterobius vermicularis eggs were detected by cellophane swab technique. Eggs of Ascaris lumbricoides， Trichuris trichiura and hookworms in fresh stool samples were examined by Kato-Katz thick smear and staturated brine floatation. 216 children were found to have infected with intestinal nematodes （12.96%）. The prevalence of E.vermicularis， A.lumbricoides，T.trichiura and hookworm was 4.44%， 8.28%， 0.54% and 0.24% respectively. Higher prevalence has been found in kindergartens with poorer environment and sanitation.

Key words: Soil-borne nematodes, Preschool children, Prevalence