Abstract: A province wide survey of parasitic infections in humans was pursued in 120 pilot sites of 32 counties/cities in Jiangsu Province in accordance with the implementation details of the 〈Nationwide Survey of Human Parasite Distribution〉. An overall infection rate of 63.5% was revealed in 63 699 people under examination. A total of 9 species of protozoa and 13 species of helminths were detected. And polyparasitism was not infrequent. The infection rates of different parasites were found as follows: Entamoeba histolytica 0.9%, Entamoeba coli 2.7%, Entamoeba hartmanni 2.2%, Endolimax nana 0.5% , Iodamoeba buetschlii 0.2% , Giardia lamblia 2.4%, Balantidium coli one case, Chilomastix mesnili 0.01%, Blastocystis hominis 2 cases, Ascaris lumbricoides 32.5%, Trichuris trichiura 27.3%, Ancylostoma duodenale and Necator americanus 21.8%, Enterobius vermicularis 23.1%, Trichostrongylus orientalis 0.01%, Ternidens deminutus 2 cases, Strongyloides stercoralis 2 cases , Trichostrongylus axei 2 cases, Clonorchis sinensis 0.5%, Fasciolopsis buski 0.4%, Taenia sp. 2 cases and Hymenolepis nana 0.04%. Obviously,the prevalence of human parasitic infections in Jiangsu is noteworthy. The infection rates of A. lumbricoides, hookworm, T. trichiura and E. histolytica were higher in females; and that of G. lamblia, higher in children; suggesting the necessity of treating target populations for different parasitoses.