The slurry pump of a heavy oil catalytic unit adopts centralized oil mist lubrication.The oil monitoring shows that the metal element content in the bearing lubricating oil is high,and the trend is increasing rapidly.It is found that the bearing of the oil slurry pump is seriously worn.The reason of bearing wear of the slurry pump was analyzed,and the combination of thin oil lubrication and oil mist lubrication was proposed to improve the bearing lubrication.The oil monitoring platform of pump group in largescale refining and chemical enterprises was used to monitor the state of key dynamic equipment,which effectively ensures the longterm safe operation of the equipment.