The article reports the result of serological investigation on toxoplasmosis among human,animaland fowl populations in Huimin District,Shandong Province.2269 samples from 1471 people,133pigs,343 sheeps,127 goats,75 chickens and 120 rabbits were tested by IHA method.There were 7%positives found in human,2.5~11.3% in domestic animals and fowls.with the highest incicencein pigs.There are marked difference in incidences between the group of farmers,cadres and the group