Abstract: Aiming at the existing problem in the lubrication of reactor pressure vessel（RPV）stud holes,this paper puts forward an effective method which adopts array bristles and small caliber oil outlet to brush anti-seize lubricant on the surface of stud holes,and gives out the detailed design of RPV stud holes lubricating equipment.The equipment has been developed and verified by testing,and the results show that it can accomplish the uniform and complete coating on the surface of stud holes.The equipment can effectively increase the lubrication of thread pairs,and reduce the incidence and risk of thread damages.