The invention relates to the technical field of steel pipe machining, in particular to a novel steel pipe perforating device. The novel steel pipe perforating device comprises a bottom plate and a topplate. A plurality of vertical columns are supported between the bottom plate and the top plate. A linear sliding table is mounted at the bottom of the top plate, a perforating motor is mounted at the bottom of the linear sliding table, and an output shaft of the perforating motor is connected with a perforating head. A hydraulic cylinder is mounted at the top of the bottom plate, a carrying plate is mounted at the top of a piston rod of the hydraulic cylinder, and a first connecting plate is mounted on one side of the top of the carrying plate through a support. A rotating motor is mounted at the top of the first connecting plate, an ejecting head is mounted on the output shaft of the rotating motor, and a second connecting plate is mounted on the other side of the top of the carrying plate through a support. The top of the second connecting plate is provided with a sliding groove, two sliding plates are in sliding connection with the interior of the sliding groove, two bearing pedestals are symmetrically mounted on each sliding plate, and carrier rollers are mounted on the bearing pedestals. According to the device, a steel pipe is supported through the ejecting head and the carrying rollers, the effect that the steel pipe is arranged horizontally is guaranteed, and the effect that no deviation is generated during drilling with the perforating head is guaranteed.