Aluminum alloy gravity casting mold

The utility model discloses an aluminum alloy gravity casting mould, which comprises an upper mould, a lower mould and a pouring nozzle arranged between the upper mould and the lower mould, the pouring nozzle comprises an upper runner component positioned on the upper mould and a lower runner component positioned on the lower mould, and the upper runner component and the lower runner component are encircled to form a pouring runner. According to the aluminum alloy gravity casting mold, the thermal compensation mechanism is arranged on the outer side of the wave-shaped flow channel, the temperature of casting liquid entering the flow channel is guaranteed in a thermal compensation mode, the situation that the casting liquid loses the temperature in the flow channel, and then the follow-up forming quality is affected is prevented, and the casting quality is improved. And moreover, the normal function of reducing the flow speed of the casting liquid of the wave-shaped runner is ensured to be unchanged, and furth