Sound insulation strip structure of aluminum alloy profile

The utility model discloses a sound insulation strip structure of aluminum alloy section bar, including section bar body, sound insulation cavity and sound insulation strip subassembly that is provided in the sound insulation cavity, sound insulation strip subassembly includes built-in long strip, inner cavity, inner cylinder and sponge filling strip, built-in long strip is provided in the sound insulation cavity, and the inner cylinder is provided with the sponge filling strip. The section of the built-in long strip is of a rectangular structure, the inner cavity is formed in the built-in long strip, and the inner cylinder is arranged in the inner cavity; through the designed sound insulation strip assembly, the sound insulation effect of the sectional material body can be improved, when noise penetrates through the sectional material body, the noise can be weakened by multiple media such as a built-in long strip, an inner cavity, an inner barrel and a sponge filling strip in the sound insulation strip assem