The invention aims at disclosing an aluminum pig casting machine. The aluminum pig casting machine comprises a molten aluminum flow automatic adjusting device, a molten aluminum distributing system, arobot slagging machine, a horizontal casting machine, an aluminum pig marking machine, a disc pig receiving conveyor, an electric chain pig receiving and holding device, a cooling conveyor, an aluminum pig overturning device, a whole row conveyor, a stacking robot, a finished product conveyor, an automatic bundler, an online weighing device, an aluminum pig stack laser marker, a storage plate chain and an electrical control system, wherein the parts are sequentially arranged. Compared with the prior art, the molten aluminum flow automatic adjusting device, the slagging robot, the automatic bundler, the online weighing device, the online marker and the delivery device are additionally arranged, full automation is achieved, the time is saved, the production efficiency is greatly improved, the cost is reduced, the aluminum pig casting machine is convenient and easy to carry out, and is easily achieved under existing conditions, and the purposes of the aluminum pig casting machine are achieved.