Filtering device of updraft type molten aluminum pump

The utility model discloses a filtering device of an updraft type molten aluminum pump. The filtering device comprises a filtering cylinder body and a fixed wedge block, the filter cylinder is installed above a molten aluminum suction inlet of the updraft molten aluminum pump, a lower port of the filter cylinder is tightly attached to the upper end face of a base of the updraft molten aluminum pump, and a fixing wedge block is inserted into the side wall or/and the top of the filter cylinder so that the filter cylinder can be fixed to the position above the base of the updraft molten aluminum pump. The filtering cylinder body can completely cover an aluminum liquid suction inlet of the updraft type aluminum liquid pump, and a through hole is formed in the side wall of the lower part of the filtering cylinder body. When the device disclosed by the utility model works, molten aluminum flows through the through holes from the outside of the filter cylinder, reaches the hollow inner cavity of the cylinder, then e