The invention discloses an EGR (Exhaust Gas Recirculation) water filtering tank and a water filtering type exhaust gas recirculation system. The water filtering tank comprises a tank body; an air inlet and an air outlet are formed in the upper part of the tank body; a water discharging hole is formed in the bottom of the tank body; a sealing floater is arranged on the discharging hole; the lower bottom surface of the sealing floater is adhered to a water discharging opening. The water filtering type exhaust gas recirculation system comprises an EGR cooler, the EGR filtering tank and an EGR valve which are sequentially mounted on an EGR pipeline. Compared with the prior art, liquid-sate water in the EGR system is filtered, so that smoke and hydrocarbon in part waste gas can be dissolved, the EGR system is purified, and the emission are reduced. Furthermore, the reliability of an engine can be further improved, aggravating of the abrasion of parts can be avoided; and meanwhile, the inflating density of the engine further can be increased, so that a novel combustion mode can be realized, the emission can be reduced, and the heat efficiency of the engine can be improved.