The invention relates to an automatic bevel edge bonding machine. The machine comprises a roller pressing device (1), a chain delivery device (2), a frame (3), a bevel edge conveying belt, glue, a cut tape, a tape pressing device (5), a front and back coarse trimming device (6), an upper and lower coarse trimming device (7), an upper and lower refining device (8), an upper and lower scraping device (9) and an upper and lower polishing device (10), wherein the roller pressing device (1) is arranged on the frame (3) and is opposite to the chain delivery device (2) up and down; and the bevel edge conveying belt, the glue, the cut tape, the tape pressing device (5), the front and back coarse trimming device (6), the upper and lower coarse trimming device (7), the upper and lower refining device (8), the upper and lower scrapping device (9) and the upper and lower polishing device (10) are arranged on the same side of the frame (3) in sequence, and close to the chain conveying device (2). The automatic bevel edge sealing machine can seal a bevel edge automatically, has the advantages of high sealing efficiency, high quality and adjustable sealing angle, and can automatically perform wood board pre-milling.