Anti-blocking gas filter

The utility model provides an anti-blocking gas filter. The anti-blocking gas filter is provided with a cylindrical filter body, wherein a first vertical sieve plate, a second vertical sieve plate and a third vertical sieve plate are arranged in the filter body, the first vertical sieve plate, the second vertical sieve plate and the third vertical sieve plate are arranged at intervals along the radial direction of the filter body, an inner cavity of the filter body is divided into a first chamber, a second chamber, a third chamber and a fourth chamber, a first filter net, a second filter net, a third filter net and a fourth filter net are correspondently arranged in the first chamber, the second chamber, the third chamber and the fourth chamber, and the mesh quantities of the first filter net, the second filter net, the third filter net and the fourth filter net are gradually increased; the bottom of the filter body is provided with four openings at intervals, the four openings respectively corresponds to the first chamber, the second chamber, the third chamber and the fourth chamber in positions, and each opening is provided with a sealing plate in a covering manner; the aperture of each sieve pore of the second vertical sieve plate is smaller than that of each sieve pore of the first vertical sieve plate and greater than that of each sieve pore of the third vertical sieve plate.