A method for repairing surface smoothness of heat-bent glass includes: providing a fluid which is transparent and solid at room temperature on an inner side of a heat-bent clear glass used for manufacturing a screen protector of an electronic device; by utilizing a mold having a pattern corresponding to the surface smoothness of a screen of the electronic device, pressing the inner side of the heat-bent clear glass and at the same time processing the fluid on the inner side of the heat-bent clear glass through a molding process so that the fluid fill a curved and uneven surface of the inner side of the heat-bent clear glass; and curing the fluid so that the inner surface of the heat-bent clear glass has a curvature and smoothness that match the curvature and smoothness of the screen of the electronic device.