Gravel crushing device for building construction

The invention relates to the field of gravel crushing, and discloses a building construction gravel crushing device. A water tank is arranged below a crushing box, an external water pump is arranged on the upper surface of the water tank, the output end of the external water pump is connected with a water pipe, the other end of the water pipe is connected with the crushing box, the end, in the crushing box, of the water pipe is connected with an internal water pipe, and a plurality of spraying heads are arranged on the surface of the internal water pipe. When the equipment conducts gravel crushing work, an external water pump arranged on the surface of the water tank can be driven, water in the water tank is conveyed into the crushing box through a water pipe and an internal water pipe and sprayed out through a spraying head, and the situation that a large amount of dust generated during crushing drifts to the outside of the equipment is effectively reduced; and a water adding opening is formed, a worker can