The invention discloses an abrasive wheel type flat steel hot bending device, and belongs to the technical field of flat steel hot bending equipment. The abrasive wheel type flat steel hot bending device comprises a worktable and a hot bending rod that are independent from each other respectively. The worktable comprises a framework bracket; a table-board is fixedly connected on the top of the framework bracket; a vertical rod is fixedly connected at the edge on one side of the table-board; a hot bending fixing component is connected in the center of the table-board; the hot bending rod is F-shaped; and the hot bending rod comprises a main rod; an upper cross bar is fixedly connected and perpendicular to the upper end of the main rod; and the main rod is fixedly connected with a lower cross bar which is in parallel with the upper cross bar. The abrasive wheel type flat steel hot bending device has the advantages of simple structure and reasonable design; the abrasive wheel type flat steel hot bending device can be made in the construction site with the materials obtained on site, thereby reducing the construction cost; and due to the fact that the abrasive wheel type flat steel hot bending device is ingenious and simple in structure, it is not easy to be broken in use; additionally, the abrasive wheel type flat steel hot bending device ingeniously uses the lever principle to save the labor and reduce the workload of the workers; moreover, the device is small in the entire size, and is convenient to move.