Adjustable breathing training device

The utility model relates to the technical field of pulmonary respiration training devices, and discloses an adjustable respiration training device which comprises a box body, the surface of the box body is communicated with a respiration assembly, and one end of the respiration assembly is communicated with an air bag. According to the adjustable breathing training device, through the arrangement of the breathing assembly, when a child puts the mouth into an air inlet cover to blow air, air blows an air stopping piece to be turned upwards, the air stopping piece is turned to block an air outlet pipe and an air inlet pipe to ventilate into an air bag, and when the child needs to ventilate, air blowing is stopped; after the air stopping piece turns over and falls off to block the air inlet pipe, the air outlet pipe is dredged, the air bag is extruded downwards under the action of the balancing weight, air in the air bag flows into the air inlet pipe, and when the air reaches the air stopping piece, the air can