Abstract: Based on the research of vibration monitoring of large scale and high-speed rotation equipment, by means of vibration monitoring and fault analysis research, and considering the actual situation of reactor coolant pump equipment running, monitoring and fault analyzing, three schemes of the reactor coolant pump vibration phase reference measurement were introduced in this paper. The comprehensive secure analysis, technical feasibility and economy evaluation were carried out, and the optimal reference measurement scheme for reactor coolant pump vibration phase was proposed.