The gas crucible aluminum alloy melting furnace is composed of a melting furnace, a crucible, a heating element, a furnace lid lifting mechanism, and an automatic temperature control system for electrical appliances. The furnace shell is welded into a cylindrical shape by section steel and steel plate. In the lower part of the front end of the furnace body, there is a hole for the crucible to form leaks due to cracks due to corrosion and oxidation. The melt in the crucible can flow out of the furnace through this hole, so that the hearth of the working room is not damaged.