Large-space hole-free rolling device and rolling method of bar production line

The invention discloses a large-space hole-free rolling device and a rolling method of a bar production line. The rolling device comprises a box body, wherein the box body is installed on a base; a horizontal roller bracket is arranged at one end of the box body; a guide point is arranged at the other end of the box body; a vertical guide roller is arranged on the box body; a horizontal guide roller is arranged on the horizontal roller bracket; and a horn mouth is connected with the horizontal roller bracket. The rolling method comprises the following steps of: heating, reserving a distance of 38m-45m between a rolling machine group and a fine rolling machine group, cooling and finishing. The rolling production line cn be used for implementing production successfully, adopts a high-technical production technique, breaks through the bottleneck of hole-free rolling, lays basic theories for industrial large-scale production, and improves theories of metal machining deformation in China. The rolling device is high in rolling capacity and low in production cost. Rolling rollers can be repeatedly used, so that the rolling roller consumption is reduced; the production operation efficiency and the production capacity are improved; the power consumption of a motor is reduced; and the market competitiveness of enterprises is improved.