Abstract: In response to the problem of low-frequency noise prevention and control, a membrane-type acoustic metamaterial is designed in this paper.By introducing the asymmetry of the mass block’s structure, new vibration modes have been formed in the low-frequency range and the noise has been effectively controlled in the low-frequency range.The designed structure of the unit cell has four perfect absorption peaks in the range of 200～1 000 Hz, and the bandwidth of the absorption coefficient above 0.56 reaches 350 Hz, while the average absorption coefficient reaches 0.53.The geometrical parameters of the thin-film metamaterials have been further optimized and the supercell structure has been constructed to realize the acoustic siphon effect.While increasing the number of units with different resonance frequencies, the structure shows a better compatibility with the air impedance, the sound absorption peak reaches 10,the maximum sound absorption coefficient is 0.983,and the average absorption coefficient reaches 0.781 in the studied low-frequency broadband range, which effectively broadens the sound absorption range of the film metamaterial structure.This study enhances the low-frequency sound absorption effect of acoustic metamaterials, providing a solution for improving the low-frequency sound absorption effect of acoustic metamaterials in structural optimization design.