Gas filtering device of purification device

The utility model discloses a gas filtering device of a purification device, which comprises a box body, a fixed base is fixedly mounted at the bottom of the box body, and a gas delivery pipe is mounted on one side of the box body in a penetrating manner. The limiting grooves are formed in the two ends of the outer frame at equal intervals, the filtering assembly can be installed in a limiting mode through the limiting grooves, then gas is preliminarily filtered through the antibacterial pre-filtering net, fine particles in the gas are removed through the HEPA filtering net, bacteria can be killed and organic pollutants can be decomposed through the photocatalyst sterilization layer, and therefore the air purification effect is achieved. And finally, a zeolite molecular sieve net can still keep relatively strong adsorption capacity on some polar molecules at relatively high temperature and relatively low partial pressure, and gas generated in the purification device is purified in a multi-stage filtration man