Realizing on-line monitoring and fault diagnosis of coal mine ventilators can ensure the stable and reliable operation of the ventilator and reduce the probability of coal mine safety accidents.Designed and developed an online monitoring and fault diagnosis system for coal mine ventilators. By monitoring the operating parameters of the ventilator to complete the diagnosis of common faults, it helps to improve the safety of the ventilator operation and ensure the safety of coal mine production. Efficiently.