Passive low frequency vibration isolator

The utility model relates to a passive low frequency vibration isolator. The passive low frequency vibration isolator comprises a closed cylindrical base, the top of the base is provided with a through hole, and the inner side wall of the through hole is uniformly provided with and movably connected with cylinder bodies of three dampers; a central connecting rod is inserted into the through hole of the base, the lower end of the central connecting rod is movably connected with piston rods of the three dampers; the top of the base is uniformly provided with three mounting fixtures; the upper part of the central connecting rod is provided with a central clamping element for a hexagon, the central clamping element is uniformly provided with and movably connected with one end of each of three flat springs, and the other end of each of the three flat springs is connected with the three mounting fixtures respectively; and the top of the central connecting rod is provided with a bearing platform. The passive low fre