The invasiveness and heat-labile enterotoxin of 11 human strains of C. jejuni were detected in NIH mice inoculated with the C. jejuni strains; the methods of plate immunological hemolysin test and SPA-coagglutination test were employed. Ten strains of the bacteria invaded the intestine; 7 strains (45.46%) were positive in SPA-coagglutination test; and 4 (36.36%) produced enterotoxin. C. jejuni in Chengdu area possess multiple pathogenicity, e.g invasiveness and heat-labile enterotoxin, but we did not find definitive correlations between the clinical manifestation and resource of strains.