A full-automatic cutting machine is characterized in that the left side of a cutting device (1) is provided with a feeding mechanism (3), and the left side of the feeding mechanism (3) is provided with a discharging mechanism (4); the feeding mechanism (3) is composed of a work bench (31), a clamping mechanism (32), a reciprocating table (34), a lead screw (35) and a servo motor (36); the lead screw (35) is fixed below the reciprocating table (34), and the servo motor (36) is fixed to one end of the lead screw (35); the reciprocating table (34) is connected to the lead screw (35) by nuts arranged on the reciprocating table, and the lead screw (35) is controlled by the servo motor (36) to rotate so that the reciprocating table (34) is driven to move right and left; the clamping mechanism (32) is fixed to the work bench (31), and located at the right end of the reciprocating table (34). The full-automatic cutting machine has the advantages of easy operation, smooth running, and automaticfeeding control, and the working efficiency is improved greatly.