A coreless paper roll rewinding machine without a winding assisting plate comprises a rewinding upper roller (1) and a rewinding lower roller (2) that are parallel with each other. Paper (3) is wound on the rewinding upper roller (1) and passes through a roller gap between the rewinding upper roller (1) and the rewinding lower roller (2). A plurality of airflow channels (4) are formed in a roller body of the rewinding lower roller (2), and each of the air flow channels (4) is interconnected with a set of air suction holes (5) on the surface of the roller body. An air suction cover (6) provided with an exhaust opening is arranged close to the end of the rewinding roller (2). When one set of air suction holes (5) on the surface of the rewinding lower roller (2) is close to the roller gap, one of the air flow channels (4) interconnected with the set of air suction holes is rotated to a region interconnected with the exhaust opening of the air suction cover (6). When the set of air suction holes (5) on the surface of the rewinding lower roller (2) is far away from the roller gap, the corresponding air flow channel (4) is rotated to a region where it deviates from the exhaust opening. This coreless paper roll rewinding machine has high winding reliability, stable rewinding function and uniform roll compactness, and can prevent the indentation on the surface of the paper roll.