Pouring system for preventing looseness defect of aluminum alloy casting

The utility model belongs to the technical field of aluminum alloy casting pouring, and particularly relates to a pouring system for preventing the looseness defect of an aluminum alloy casting, which comprises a base, a lifting mechanism is arranged at the bottom of the base, a casting ring is fixedly connected to the upper surface of the base, and a temperature ring is fixedly connected to the outer surface of the casting ring. A top cover is arranged at the top of the casting ring, a temperature ring is arranged outside the casting ring, the top cover is arranged at the top, and regulation and control mechanisms are installed on the top cover and the temperature ring, so that liquid in the temperature ring and the top cover is heated to the proper temperature through the regulation and control mechanisms, and the difference between the temperature of molten metal in the casting ring and the external temperature is reduced; the molten metal is gradually solidified and cooled from bottom to top, looseness an