Narrow-surface copper plate of chamfer crystallizer for thin slab continuous casting

The utility model relates to the field of metal continuous casting, in particular to a narrow-surface copper plate of a chamfer crystallizer for thin slab continuous casting. A work surface of the narrow-surface copper plate comprises a flat surface zone (2) and a curved surface zone (3), wherein the flat surface zone (2) is positioned in the middle of the work surface; the total width of the copper plate is 50-110mm, the height is 800-1200mm and the thickness is 50-100mm; the flat surface zone (2) and the curved surface zone (3) are connected smoothly in a tangent way in the direction of the cross section; corner parts of the edge of the copper plate are thickest, centre line parts of the cross section are thinnest and the thickness difference H between the corner parts and the centre line parts is 2-9mm; and three to six round-pipe type cooling water channels (5) with the same specification are uniformly distributed inside the copper plate. The corner parts of the thin slab pured by the narrow-surface copper plate are in a transition type of an arc angle; the temperature at the corner parts of the cast slab is high; and the stress during bending and straightening processes is small, therefore the corners of the cast slab can be effectively restricted from transversely cracking.