Resonant cavity sound absorption structure and low-frequency sound insulation and heat preservation wall

The invention provides a resonant cavity sound absorption structure which comprises a hollow outer cavity and an insertion pipe penetrating into the outer cavity from the cavity wall of the outer cavity. One end of the intubation outside the outer cavity is open, and the other end is closed; the intubation tube is positioned in the outer cavity, and small holes are formed in the tube wall close to the opening end; a resonant sound cavity is formed between an outer cavity body of the resonant cavity sound absorption structure and an insertion pipe, air in the sound cavity generates a resonance effect along with sound waves, and sound wave energy is consumed; the invention further provides a low-frequency sound insulation and heat preservation wall applying the resonant cavity sound absorption structure, the low-frequency sound insulation and heat preservation wall comprises two layers of wallboards arranged in parallel and a resonant sound absorption body arranged between the two layers of wallboards and arran