The invention relates to a purifying apparatus for weaving exhaust gas, and a printing and dyeing apparatus. The purifying apparatus for weaving exhaust gas comprises a wind power member, a purifying chamber and a water tank, wherein the purifying chamber comprises a shell in which a purifying cavity is formed, a purifying assembly, and a wind inlet, a wind outlet and a water outlet all arranged on the shell and communicated with the purifying cavity; the wind power member sends exhaust gas produced in weaving to the purifying cavity via the wind inlet; the purifying assembly is arranged in the purifying cavity and above the wind inlet and produces water mist contacting with the exhaust gas; the wind outlet is located above the purifying assembly and used for discharging purified gas having been purified in the purifying cavity; and the water tank is communicated with the water outlet. According to the purifying apparatus for weaving exhaust gas, the water mist produced by the purifying assembly interacts with fibrous pollutants, auxiliary agent, oil wax and the like in the exhaust gas, so fibrous substances gain weight after absorption of water and flow into the water tank from the water outlet along with water, and fibrous impurities do not accumulate at the wind outlet of the purifying chamber; thus, potential fire hazards of the procedure of printing and dyeing in weaving are reduced.