Dedicated filtering device for impurity removal of electrolytic cell

The utility model discloses a dedicated filtering device for impurity removal of an electrolytic cell, and belongs to the field of electrolytic cell equipment. The dedicated filtering device comprises a material inlet (1), a fast check hole (2) and a material outlet (4), and further comprises a filter screen (3) arranged between the material inlet (1) and the material outlet (4); the filter screen (3) comprises an upper-layer filter screen (31), a middle-layer filter screen (32) and a side filter screen (33), and adopts a convex structure. Through the unique design of the upper-layer filter screen, the middle-layer filter screen and the side filter screen, impurities such as large paper scraps, waste iron scraps, cement blocks and block aluminium oxides can be fully screened from the materials, the purity of electrolytic aluminium is ensured, and the energy consumption and the production cost are reduced.