The invention discloses a high-efficiency crushing device for waste bricks of building wall materials, which comprises a bottom plate, a crushing frame, a first crushing plate, a first rack, a gear, a second crushing plate, a first connecting rod, a guide rod, a second rack, second connecting rod, disk, crankshaft, motor, first connecting rod journal, second connecting rod journal, first piston rod, second piston rod and nozzle, the present invention is provided with motor, crankshaft, circle The plate, the first connecting rod and the second connecting rod are used to crush waste bricks from top to bottom through the cooperation of the above parts, and the crushing speed is fast. There are guide rods, second racks, gears and first racks. Cooperate with the first crushing plate to crush the waste bricks from the left and right sides, making the crushing more thorough and even, improving the crushing efficiency and reducing the labor intensity of the staff. There are first connecting rod journal and second connecting rod journal , the first piston rod, the second piston rod and the nozzle, through cooperation to achieve continuous water spraying and dust reduction, to avoid affecting the health of the staff.