Abstract: Chicken coccidiosis is one of the more common parasitic diseases in the process of raising chickens, which has the characteristics of epidemic and wide range of infection. Coccidia parasitize in the chicken intestinal tract, causing damage to its intestines,and various harmful bacteria pass through the intestinal wall, causing a variety of diseases. The egg sac discharged with feces can lead to the infection of the whole chicken herd, causing serious harm to the chicken breeding industry. This article introduces the epidemiology, clinical symptoms, diagnosis, prevention and treatment of chicken coccidiosis, and provides reference for the majority of farmers to prevent and control coccidiosis.