Device for circulating and treating sewage of washing machine

The invention discloses a device for circulating and treating sewage of a washing machine. The device comprises a sewage holding tank, a filtering part, a purified water storage part and a control device, wherein the filtering part comprises a body part which is communicated with another chamber of the sewage holding tank through a first tube body, a first filtering part, a second filtering part, a third filtering part, a fourth filtering part and a fifth filtering part which are sequentially arranged inside the body part from high to low of the body part, a water quality monitoring sensor which is arranged at the bottom of the body part, and a return water tube of which two ends are respectively connected with the top and the bottom of the body part; the purified water storage part comprises a purified water tank which is connected with the top of the body part, and an activated carbon adsorption membrane and a far-infrared mineralized sphere filter element which are sequentially arranged inside the purified water tank from high to low of the purified water tank; a second tube body is communicated between the bottom of the body part and the top of the purified water tank; the control device comprises a controller, a display which is electrically connected with the controller, and buttons which are electrically connected with the controller. The device is simple in structure, and a very good use effect can be achieved.