The present invention minimizes noise and vibration in hydraulic rock drills used for excavating hard ground, drilling holes, breaking rocks, and breaking asphalt or concrete layers to repave the pavement. The present invention relates to a soundproof dustproofing device for a hydraulic rock drill, comprising: a rock drill body comprising a head cap portion, a cylinder portion equipped with a hydraulic valve, and a front head portion mounted with a blow tool, a case body accommodating the rock drill body, and a case body. In the hydraulic rock drill device comprising a bracket fastened to the head fastening portion in a closed state, the space is formed between the inner circumferential surface of the case body for receiving the rock drill body and the rock drill body, and formed on one side of the head portion of the case body A hydraulic pressure inlet, and a hydraulic pressure connected to the hydraulic inlet The hydraulic pressure is injected and filled into the space through the hose and the hydraulic hose so as to soundproof and dustproof. In addition, when the hydraulic pressure injected and filled into the space is water pressure, between the case body and the front head of the rock drill body. A hydraulic flow path is formed radially on the bottom of the front soundproof dustproof material interposed therebetween, and a plurality of nozzle holes are formed on the front surface of the case main body to scatter water pressure around the blow tool. It is characterized by making it possible to suppress the generation of dust.
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