Filtering and impurity removing device for sludge treatment

The utility model discloses a filtering and impurity removing device for sludge treatment, which relates to the technical field of sludge treatment and comprises a sludge crushing cylinder, a sludge feeding hole is formed in the inner top wall of the sludge crushing cylinder, a crushing mechanism is arranged in the sludge crushing cylinder, and the bottom surface of the sludge crushing cylinder is fixedly communicated with a sludge feeding cylinder; and a stepping discharging mechanism is arranged in the sludge passing barrel and comprises a second motor and a baffle plate, the bottom end of the sludge passing barrel fixedly communicates with a sludge filtering and impurity removing box, and the outer surface of the second motor is fixedly connected with the inner top wall of the sludge filtering and impurity removing box. Through cooperation of the sludge passing barrel and the stepping discharging mechanism, smashed sludge can be discharged in a stepping mode, the situation that sludge mixed with impurities