The utility model relates to an use hydrodrillrig equipment, especially automatic start-stop device of hydrodrillrig water supply in the drilling of colliery rock gangway operation line headwork face porthole. The device include shut off valve, pipeline, three-way valve, shut off valve one end links to each other with the one end of pipeline with the water supply start-stop controlling means water intake pipe intercommunication that has the water supply ball valve, its other end, the other end connection of pipeline is served at one of three-way valve, and all the other both ends and the hydrodrillrig of three-way valve enter go back to to bore hydraulic control device go back to oil pipe way and communicate with each other. The utility model discloses simple structure, convenient to use are swift, practice thrift the water source, have reduced the drilling cost, have improved drilling efficiency, have realized the civilization construction in tunnel.