The invention relates to a helmet with an adjustable tuyere. The helmet contains a helmet body (1), wherein a tuyere (2) is formed in the helmet body (1); one base (3) is arranged at the periphery of the tuyere (2), the base (3) is of a U-shaped structure, an open end of the base (3) of the U-shaped structure faces a windward side, sliding slots (3.1) are formed in the two sides of the base (3), the left side and the right side of a sliding plate (4) are embedded into the sliding slots (3.1), the sliding plate (4) is arranged above the tuyere (2), a pressing plate (4.1) is laminated on the upper surface of the sliding plate (4), and the pressing plate (4.1) covers above the base (3). The helmet with the adjustable tuyere has an opening and closing regulating function and can filter dust in the air while fresh air is introduced.