Sewage multi-stage filtering device with replaceable filter paper

The utility model relates to the technical field of accessory devices of filtering devices, in particular to a sewage multi-stage filtering device with replaceable filter paper, and provides the sewage multi-stage filtering device with the replaceable filter paper, which can realize multi-stage filtering when sewage is filtered, so that the filtering effect is improved, and the practicability is enhanced. Comprising a working box, a first sleeve, a first filter screen, a second sleeve, a second filter screen, a funnel, a collecting tank, a water pump, a drainage pipe, a collecting barrel, filter paper and a connecting frame, a working cavity is formed in the working box, the first sleeve is installed on the left side of the top end of the working cavity, and the top of the left end of the first sleeve communicates with a water inlet pipe; the second sleeve is installed at the bottom end of the first sleeve, the funnel is installed at the bottom end of the second sleeve, the second filter screen is installed i