The invention relates to a zero-frequency swing vibration isolation device. The zero-frequency swing vibration isolation device comprises a base part (3), a supporting part (2) and a fixing part (4),wherein the base part (3) is a curved surface base part, the supporting part (2) is positioned in the curved surface, the top of the supporting part (2) is provided with a curved surface cover, and the two ends of the fixing part (4) are connected with a cover (1) and the base part (3) respectively. According to the zero-frequency swing vibration isolation device, the defects in the prior art areovercome. The zero-frequency swing vibration isolation device is used for resisting the seismic action of electric power facilities in a transformer substation and a converter station, and has the advantages of being reasonable in design, good in damping effect, simple in structure and good in stability.