The invention discloses a stone crushing device for
house building engineering. The stone crushing device comprises a crushing bin, a discharging opening is formed in the middle position of the bottom of the crushing bin,
impact assemblies are symmetrically arranged on the two sides of the bottom of the crushing bin, a second
servo motor is arranged at the middle position of the bottom of one end of the front face of the crushing bin, and a second rotating rod extending into the crushing bin is arranged at the output end of the second
servo motor. Through mutual cooperation of the second
servo motor, the second rotating rod, a screening net plate, connecting rods, tooth blocks, half gears, poke rods, hinged rods,
impact balls, fixing blocks, sliding rods, mounting grooves, first springs, arc-shaped sliding rods and second springs, the discharging opening can be continuously impacted, so that the discharging opening is prevented from being blocked, the discharging speed of the discharging opening is increased, an operator can do manual dredging work without the help of other dredging tools, the working steps of the operator are reduced, and the working efficiency and operation convenience of the device are improved.