The utility model relates to an interim plugging device after pipeline tapping and shutoff piece and iron fillings cleaning device thereof, the shutoff piece is including the shutoff main part that isused for carrying on the shutoff to the hole of pipeline. Iron fillings cleaning device is including being used for installing the splint and the scrubbing brush of setting on splint in shutoff mainpart one end, the scrubbing brush is set up to the outer lane extension of shutoff piece by splint to turning to after the trompil is filled in to the shutoff piece when sealed, letting the hole of scrubbing brush clearance pipeline correspond the iron fillings of position, making the hole that the shutoff main part can the shutoff pipeline. The iron fillings that iron fillings cleaning device canproduce the sealed position at the shutoff piece when shutoff piece entering pipeline hole turns to are cleared up, and it influences sealing performance, lift -off seal effect to let the shutoff piece not have iron fillings when sealed.