The invention discloses a full-automatic beamsplitter slotting machine. The full-automatic beamsplitter slotting machine comprises a rack (1), a transverse transmission mechanism, a feeding transmission mechanism and a rotary mechanism, as well as a slotting machine I (2) and a slotting machine II (3) which are arranged on the rack (1), wherein a saw blade (4) is mounted on each of the slotting machine I (2) and the slotting machine II (3); two bases A (9) are fixedly mounted on the rack (1); a servo motor A (6) is fixedly mounted on the rack (1), located between the two bases A (9) and parallel to the bases A (9); the output terminal of the servo motor A (6) is connected with a screw rod A (7); a traverse moving carriage (8) is arranged on a nut A (5); and sliders A (11) are mounted on guide rails A (10). The full-automatic beamsplitter slotting machine has the following beneficial effects: the degree of automation is high, the beamsplitter slotting efficiency is greatly improved, the labor intensity of workers is greatly reduced, and the machining precision is improved.