Abstract: Piglet diarrhea has complicated reasons and it is one of common diseases that often brings a great economic loss in pig farm.The diarrhea situations of piglets in 12 large-scale pig farms with the livestock population of foundation sow of over 400 heads in Anhui,Henan and Jiangsu Provinces were investigated from January of 2011 to April of 2011.The incidence characteristics of piglet diarrhea in these pig farms were analyzed.Different prevention and cure methods were summarized,so as to provide reference for veterinary workers.