The utility model discloses a breathing machine fixed band convenient to adjust, including the fixed band, the both ends of fixed band are connected with the bonding die respectively and from the thread gluing, and bond on the bonding die from the thread gluing, the positive fixedly connected with sweat -absorbing piece of fixed band side surface, the equal fixedly connected with arc -shaped sleeve in the positive both sides of sweat -absorbing piece, it has the oxygen therapy pipe to alternate in the arc -shaped sleeve, and the bottom of two oxygen therapy pipes passes through intake -tube connection, the equal fixedly connected with intubate in both sides at intake pipe side surface top, and the sliding sleeve has all been cup jointed in the folding department of fixed band both sides. The utility model discloses a to the improvement of fixed band, when two sliding sleeves of relative slip, because the equal fifty percent discount in both sides of fixed band to the size that can reduce head circle gradually at this moment, can when stimulateeing two arm -ties dorsad, can drive two arc splint through pull rod and slide and break away from the fixed band according to the slide length of sliding sleeve of actual conditions, at this moment, and two sliding sleeves that slide dorsad, the enlarged footing size of enclosing gradually.