Abstract: In this paper, taking a containment spray pump in a third generation nuclear power plant as an example, the whole system is modeled and analyzed. The aseismic performance, modal and stress of each component, structural buckling and connection bolt stress of the system are analyzed and evaluated , and on-site vibration frequency is tested. The results show that the containment spray pump meets the requirements of the code, and the results  are in good agreement with that from the equipment modal test, which provides research support for the follow-up safety assessment and equipment appraisal.