This aluminum billet cold shear is used for cutting the cold aluminum billet which no need pre- heating, and applied in the aluminum extrusion production line which has short billet heating furnace; this machine adopts semi-automatic operation table, with the automatic cylinder for pressing aluminum billet and pulley for feeding and discharging billet. The surface will be smoother and keep its shape and save more material form the cross-section of billet shearing. Meanwhile, the operation will be more convenient.