A noise reduction structure (70) for a ventilation treatment device and the ventilation treatment device, relating to the field of ventilation treatment devices. The noise reduction structure (70) comprises a first micropore plate (71); the first micropore plate (71) has a first plate surface (714) and a second plate surface(715) which are opposite to each other, the first plate surface (714) is used for forming a first chamber (73); the second plate surface (715) is used for forming an air passage (74) such that air in the air passage (74) flows along the second plate surface(715); the first micropore plate(71) has a plurality of first micro-vias (711) through which the first chamber (73) communicates with the air passage(74). The noise reduction structure (70) is wide in noise reduction frequency band, may effectively reduce aerodynamic noise in the air passage (74), and improves the satisfaction degree of a patient using the ventilation treatment device. In addition, the noise reduction structure (7) also has the advantages of simple processing and design, low costs and wide application environments.
