Cutter bar mounting seat, inner burr removing device and welding pipe making machine

The utility model relates to a cutter bar mounting seat, an inner burr removing device and a welding pipe making machine. The technical problem that the adjustability of a cutter bar mounting seat is poor is solved. The cutter bar mounting base comprises a base, a first moving mechanism connected to one side of the base and capable of moving relative to the base in the first direction, a second moving mechanism connected to the side, away from the base, of the first moving mechanism and capable of moving relative to the first moving mechanism in the second direction, and a third moving mechanism connected to the side, away from the base, of the second moving mechanism. The third moving mechanism is connected to the side, away from the first moving mechanism, of the second moving mechanism and can move in the third direction relative to the second moving mechanism, the third moving mechanism is connected with the cutter bar, and the first direction, the second direction and the third direction form angles.