An integrated building block grooving machine comprises a rectangular crate (7) and a grooving device arranged in the crate, the grooving device comprises a dust falling water trough (1) formed in thelower portion of the crate and a grooving depth adjustment supporting seat (3) arranged above the dust falling water trough, the grooving depth adjustment supporting seat (3) is connected with an adjustable blade combination device (4) and a motor (2), a sliding plate (5) is arranged on the top face of a crate body of the crate (7), and a protective cover (6) is arranged on the position, corresponding to the adjustable blade combination device (4), above the sliding plate (5). According to the integrated building block grooving machine, the grooving depth, width and distance of a building block can be controlled, the grooving efficiency and the grooving quality are effectively improved, the problem that flying dust is over much in the mechanical grooving process is solved, and operation is safe and convenient.