The invention discloses a bearing roller for a rolling mill, the rolling surface of a roller is a revolution surface structure formed by revolving around a central line by a straight circular arc; a straight circular arc inclination state leads two sides of the roller to form a large end surface with large cross section and a small end surface with small cross section; the edge positions of the end surfaces at two sides of the roller are rounded off; a circular arc flat-bottomed groove is arranged at the central position of the large end surface, and the wall of the groove is an indented circular surface transitional form, and the small end surface forms a spherical surface groove from edge to center; the bearing roller in the invention is located axially, only pushing parts are arranged in the indented positions of the end surface at two sides, thereby not only reducing the abrasion area of the roller end surface and the traditional check ring, reducing the abrasion and improving the service life of the bearing, but also enhancing the thickness of the roller and the abrasive resistance owning to a circular arc rotational structure of the rolling surface.