The utility model relates to a high-pressure water gun arranging device in ore pulp pipeline conveying, which comprises a perpendicular tubular support and a screw stem. The screw stem is fixed with a high-pressure water gun head, the perpendicular tubular support is disposed on a pulp generating tank operation platform for ore pulps to flow out, and the screw stem can move up and down on the perpendicular tubular support via a moving device. By using threads to drive the screw stem to move up and down relevant to the perpendicular tubular support, the high-pressure water gun arranging device can adjust perpendicular height of the high-pressure water gun head so as to realize different jetting lengths, and simultaneously, the screw stem can adjust horizontal spraying angles of the high-pressure water gun in a rotating process.