Surface grooving device for BM interlocking building block

A surface grooving device for a BM interlocking building block comprises a base, supporting legs are arranged on the lower side of the base, a hole is formed in the middle of the base, a first mounting plate controlled by a first air cylinder to move front and back is arranged in the hole, a clamp is further arranged on the first mounting plate, a second air cylinder is arranged on the upper side of the base through a supporting plate, and a third mounting plate is arranged at the lower end of a piston rod of the second air cylinder. Limiting plates are arranged at the left end and the right end of the third mounting plate respectively, a cross rod is arranged between the two limiting plates, two sliding blocks are arranged on the cross rod, a fourth mounting plate is connected to the lower sides of the two sliding blocks, and a spring is arranged on the cross rod and corresponds to the position between the left limiting plate and the left sliding block; a guide plate is arranged on the left side of the fourt