The invention discloses a low-frequency vibration-isolation combined sandwiched structure. The low-frequency vibration-isolation combined sandwiched structure comprises a lower uniform layer, a middle layer and an upper uniform layer sequentially from bottom to top, wherein the middle layer is of a limited two-dimension photonic crystal structure, the limited two-dimension photonic crystal structure comprises a base body and a plurality of scatters embedded into the base body, the scatters are respectively connected with the upper uniform layer and the lower uniform layer into a whole, and the lower uniform layer, the scatters and the upper uniform layer (3) are all made of rubber materials. The scatters, the upper layer and the lower layer are combined into an integrated body and are made of the same materials. The base body needs to be fixed. The low-frequency vibration-isolation combined sandwiched structure can block incident vibration along a plate and low-frequency vibration perpendicular to the plate through the designed structure, be applied to vibration control within the frequency range of hundreds of hertz, and serve as a low-frequency vibration-isolation facility of projects such as foundations and inner walls of buildings, ships and warships, and high-speed rails.