The invention discloses a drill pipe mud scraping device, comprising a positioning seat, wherein the positioning seat is formed by butting two parts which are symmetrical to each other, the center of the positioning seat is provided with a through hole, slide ways are uniformly and fixedly arranged in the positioning seat along the circumference direction, each slide way is internally provided with a mud scraping slider, an adjusting screw rod and a pressure spring respectively, the inner ends of the adjusting screw rods are connected with the mud scraping sliders, the outer ends of the adjusting screw rods penetrate out of the positioning seat and are provided with locknuts, the pressure springs sleeve the adjusting screw rods and are located between the mud scraping sliders and the side wall of the positioning seat, and the inner end parts of the mud scraping sliders are mutually meshed to form a taper hole. According to the drill pipe mud scraping device, the positions of the mud scraping sliders can be automatically adjusted by the pressure springs, so that the size of the inner diameter of the taper hole can be automatically adjusted when a coupling is encountered during pull out of hole, and blocking is avoided during pull out of hole, mud on the surfaces of a drill pipe and the coupling can be thoroughly scraped, and is prevented from splashing to a drill floor and operators during pull out of hole, the operation environment can be protected, and the operation efficiency of workers is improved; the drill pipe mud scraping device is long in service life and is not easy to damage.