Taking the first 110kV high-voltage transmission and distribution equipment in Asia and an offshore CEPC platform jointly built with oil and gas processing facilities as an example, a platform structural model was established using SACS software to analyze the vibration generated by the operation of seven high-power water injection pumps arranged on the lower deck of the platform. The main analysis includes whole body modal analysis, local modal analysis near the transformer, and harmonic response analysis to determine their impact on the platform structure and high-voltage electrical equipment. The results show that the vibration response displacement caused by the water injection pump is relatively small, and the overall structural vibration frequency and the local structural vibration frequency of the transformer are far away from the working frequency of the water injection pump, making it difficult to generate resonance. The impact of vibration on local high-voltage transmission and distribution equipment cannot be ignored. Reducing the impact of vibration on high-voltage electrical equipment and providing vibration reduction measures for high-voltage electrical equipment can provide important reference for subsequent engineering projects.