Abstract: The effects of the track vibration isolation measures on environmental vibration isolation in Beijing, Shanghai and Guangzhou metro operation lines were studied. The track vibration isolation performances of products by different manufacturers were compared. Fuzzy concepts in frequency domain analysis of the anti-vibration performance were clarified. The differences of the isolation effects in different frequencies of a variety of track vibration measures were analyzed. The principle of classifying various track vibration isolation measures according to the general, medium, high and special isolation measures in the city orbit traffic environmental impact assessment was proposed, and the recommendations on the valuing scopes of various grades of vibration isolation effects were given.