The invention discloses an aluminum material punching mechanism, and belongs to the field of material processing mechanical equipment. The aluminum material punching mechanism comprises a fixed bracket, a punching air cylinder, a lifting pushing plate, a translation punching plate, a material pressing air cylinder and a material supporting bracket, wherein the lifting pushing plate is horizontally arranged at an output end of the punching air cylinder; the translation punching plate is horizontally arranged on the fixed bracket at the lower side of the lifting pushing plate; a plurality of translation guide rods are horizontally and uniformly arranged below one side of the translation punching plate; translation springs are arranged on the translation guide rods between a translation baffle block and the fixed bracket; a punching circular rod which is horizontally arranged is arranged in a mounting machine head; the output end of the material pressing air cylinder is horizontally equipped with the material pressing plate; the material supporting bracket is horizontally arranged on the fixed bracket at the lower side of the material pressing plate; and a lifting spring is arranged on a lifting guide rod at the upper side of the fixed bracket. The aluminum material punching mechanism disclosed by the invention is reasonable in structural design, and can be used for quickly and conveniently punching an aluminum material accurately and efficiently, so that punching efficiency and punching quality are improved, and producing processing needs are met.