The invention relates to a combined type vibration isolating device used for a transformer. The combined type vibration isolating device comprises a spring vibration insulator and a rubber vibration insulator, wherein the spring vibration insulator is positioned on the upper layer of the rubber vibration insulator, and is connected with a machine base table rack of the transformer; the rubber vibration insulator is positioned on the ground; the spring vibration insulator comprises at least two spring vibration isolating elements; the rubber vibration insulator comprises at least two rubber vibration isolating elements; the number of the spring vibration isolating elements is the same as that of the rubber vibration isolating elements; and the vertical axes of the spring vibration isolating elements and the vertical axes of the rubber vibration isolating elements are on the same plumb line. Compared with the prior art, the combined type vibration isolating device has the advantages of being wide in range of isolated vibration frequency, good in vibration isolating effect, strong in system stability, free of coupling vibration in other directions and the like.