Dust falling device for excavator

The utility model relates to a dust falling device for an excavator. The dust falling device is characterized by comprising an excavator, a water tank, a water tank mounting rack, a water pump and a sprinkler head, the excavator comprises an excavator body and a movable arm, a supporting block is fixed to the lower end of the tail of the excavator body, a first mounting groove is formed between the supporting block and the excavator body, and a second mounting groove is formed in the upper end of the tail of the excavator body; the water tank mounting rack comprises a mounting rack body for placing a water tank, a lower connector and an upper connector, one end of the lower connector is fixed with the lower end of the mounting rack body, the other end of the lower connector is fixed in a first positioning groove of the excavator, one end of the upper connector is detachably connected with the middle of the mounting rack body, and the other end of the upper connector is fixed in a second mounting groove of the