The utility model discloses a needle valve comprising a valve body; the valve body is provided with a horizontal air inlet hole, a horizontal air outlet hole and a vertical control hole; the air inlet hole is communicated with the bottom of the control hole; a valve rod with the upper part penetrating out of the valve body is arranged in the control hole; a step matched with the bottom of the valve rod and used for blocking the control hole is arranged in the control hole; the air outlet hole is communicated with the control hole at the upper part of the step; a containing cavity coaxial with the control hole is further arranged at the upper part of the valve body; a pressing gasket, a sealing gasket and a disc spring sleeved on the valve body are arranged in sequence from bottom to top in the containing cavity; and the upper part of the valve body is provided with a locking nut for sealing the containing cavity. The needle valve disclosed by the utility model has the advantages of adopting the disc spring and being short in travel, convenient to use and high in safety; and the pressing gasket is further arranged, so that the pressing effect is improved and the air impermeability is guaranteed.