Flies are one of the four pests, carrying many pathogens that can spread over 30 diseases, including typhoid fever, paratyphoid fever, poliomyelitis, infectious hepatitis, poliomyelitis, cholera, dysentery, infant diarrhea, food poisoning, and intestinal parasitic diseases. To eliminate flies, we must seize favorable opportunities, eliminate adult flies and pupae in winter, eliminate the first generation flies in spring, and vigorously eliminate adult flies in summer and autumn. Improving environmental hygiene, strengthening fecal management, and removing garbage and sewage are all effective measures to eliminate flies.