The utility model relates to a clear hole device specifically is a clear hole of porthole device. The clear hole of traditional high -pressure wind clean up has completely been solved, cleaning time is very long, hinder the process time, explode the problem that the powder charge brought the very big construction degree of difficulty for the brill, a clear hole of porthole device, include the main part who makes by galvanized steel pipe, the outside of main part one end is equipped with anti -slip handle, the main part other end is the port of flat shape, a transverse connection spare is worn to be equipped with in the port top, be equipped with the connection piece by the steel sheet preparation on the transverse connection spare, be equipped with the iron sheet crotch on the connection piece, the inside round steel of wearing to be equipped with a logical length of main part, round steel one end is connected with the connection piece, the round steel other end stretches out main part outer and be equipped with the connecting piece handle at the tip. According to the geology condition, adopt simple mechanical motion principle, rely on main part at the nimble connection piece of main part end self -control, clear up downthehole rubble, shortened the engineering time greatly.