Breathing mask with adjustable tightness

The utility model discloses a tightness-adjustable breathing mask which comprises a mask body and connecting ropes and is characterized in that the connecting ropes are symmetrically connected to the two sides of the mask body, the other ends of the connecting ropes are embedded in a fixing box, and a protective pad is fixedly connected to the surface of the fixing box; and rotating shafts are symmetrically and rotationally installed in the fixing box, belts are installed on the surfaces of the two rotating shafts in a sleeving mode, and connecting ropes are fixedly connected to the surfaces of the rotating shafts. According to the breathing mask with the adjustable tightness, the first motor, the rotating shaft and the connecting rope are arranged, the motor drives the rotating shaft to rotate, the connecting rope is wound on the surface, the connecting rope is tightened, the length of the connecting rope can be adjusted according to the head circumference of a wearer, the breathing mask can be better attach