Rolling method of realizing square isometric crystal zone

The invention discloses a rolling method for realizing a square isometric crystal zone. According to the rolling method, a heated rectangular continuous casting billet with the large end face is rolled, and the rolling is carried out by controlling the heating temperature of the continuous casting billet and the pass reduction. The rolling method comprises the following steps of: step 1. heating,wherein the heating temperature of the rectangular continuous casting billet with the large end face is controlled; and step 2. rolling, wherein the pass reduction is controlled for rolling the continuous casting billet. The rolling method has the beneficial effects that due to the inherent characteristics of the rectangular continuous casting billet with the large end face, a thick isometric crystal is generated in the central part of the rectangular continuous casting billet in the continuous casting billet forming process; the internal defects of the continuous casting billet can be reducedor eliminated through a r