The invention relates to the technical field of SMC air cylinders, in particular to an SMC air cylinder with a noise reduction function. The SMC air cylinder comprises a supporting base, an air cylinder body is installed above the supporting base, and the air cylinder body comprises an air cylinder barrel; and a top plate and a bottom plate are correspondingly arranged at the upper end and the lower end of the cylinder barrel. A plurality of air cylinder mounting frames are installed on the periphery of the cylinder barrel, and the upper end, the lower end and the middle position of each air cylinder mounting frame are correspondingly provided with a butt joint sleeve and a directional sleeve; first springs are connected between the inner walls of the butt joint sleeves and the side rods embedded into the cylinder barrel, and second springs which surrounds the side rods are arranged on the upper side and the lower side of the directional sleeve; the vibration of the air cylinder can beeffectively reduced when the air cylinder works, a plurality of lantern rings are arranged on the periphery of the cylinder barrel, and a plurality of third springs are connected between the lanternrings and the cylinder barrel; and the vibration of the air cylinder can be further reduced, the shock absorption and noise reduction effects of the air cylinder can be achieved in the mode, and the air cylinder shock absorption and noise reduction device are very practical.