To understand the behavioral risk factors related to acute diarrhea in the migrant population.Methods From migrant population colony, we collected data from the dining and kitchen environment, food purchasing, food processing, eating habits and food store, with 38 indicators. Case control was used to investigate diarrhea cases, and stratified Cox model was used for data statistics and analysis. Results Case control study showed that buying fresh food (OR=0.165,95%CI:0.051-0.537), cleaning hands before handling food (OR=0.192,95%CI:0.038-0.981), adequate heating food remains before eating (OR=0.238,5%CI:0.057-0.990) were protective factors. Eating cooked food with blood left (OR=4.288,5%CI:1.143-16.080), having breakfast in the stalls, roadside shop and sidewalk snack booth (OR=31.323,5%CI:1.323-741.570), eating deli from store (OR=4.640,5%CI:1.538-14.000) were the major risk factors. Conclusion A good habit of personal health and cooking as well as eating at home can control acute diarrhea in the migrant population.