Low-noise oil-free air compressor

The invention relates to a low-noise oil-free air compressor which comprises a rack, an air storage tank arranged on the rack, a compressor and a motor, the compressor and the motor are arranged on the air storage tank, the bottom of the rack is rotationally connected with four rollers, one end of the air storage tank is a first end, and the other end of the air storage tank is a second end. A water outlet is further formed in the outer wall of the bottom side of the first end, a plugging cover is arranged on the water outlet, a fixing ring is arranged on the outer wall of the gas storage tank, supporting rods are arranged on the two sides of the fixing ring, and the ends, away from each other, of the two supporting rods are rotationally connected to the rack; the rack is further provided with a driving mechanism used for driving the air storage tank to rotate so that the second end can be higher than the first end. When the gas storage tank is drained, the gas storage tank is toppled over, so that accumulate