The utility model relates to a metal field with continuous casting of solidifying, especially a rolling device in continuous casting billet bight carries out. Among the the device, chamfer roll (1) includes roll body (13) and pivot (14), and the both ends centre gripping of pivot (14) is on roll braced frame (2), roll carriage release lever (3) by pneumatic cylinder (7) drive reciprocating motion on locator slide (4), to casting blank (11) to carry out the bight rolling, make casting blank formation chamfer, pneumatic cylinder (7) are supported by pneumatic cylinder supporting seat (8) of installing on base (9), the side of roll body (13) is the working face, and mid portion (15) of working face are the locating surfaces that the casting blank rolls the angle, and the inclined plane part (16) of the working face of both sides is the edged surfaces that roll of casting blank. The utility model discloses can effectively avoid the steel surfaces limit portion directly to split or stick up the emergence of skin defect, reduce the cutting edge volume of slab band material, improve the lumber recovery of casting blank.