The invention discloses a die-casting die for an aluminum alloy wheel hub. The die-casting die adopts a central feeding system, so that the size of the die is reduced, and good effects of castings in mold filling, strength, appearance and the other aspects are realized. The die-casting die comprises a fixed die clamping plate, a finger cam, a fixed die bolster, a mounting plate, a sliding block, a moving die bolster, a moving die clamping plate, a pull rod fixing plate, a moving die small core, a diversion cone, a push pipe, a push plate, cushion blocks, a moving die insert, a fit strip, a guide sleeve, a fixed die insert, a fixed die feed opening insert, a guide post, an inner gate insert, a sprue bush and a pull plate, wherein the sprue bush is fixedly arranged in a mounting hole of the fixed die clamping plate; the upper end of the guide post is arranged on the fixed die clamping plate; the lower end of the guide post is arranged in a mounting hole of the mounting plate through the guide sleeve; the bottom of the guide post is arranged in a mounting hole of the moving die bolster; the fixed die bolster is arranged on the top surface of the mounting plate; and the fixed die feed opening insert is arranged in the mounting hole of the fixed die bolster.