Abstract: A method for designing uniform illumination reflector, which has a light entering opening and a light emitting opening, includes the steps of: determining a light source, the diameter of an illuminated surface and the distance between the light source and the illuminated surface, determining the maximum emitted half-angle of the reflector, and determining an aperture of the light entering opening; in a two-dimensional plane, forming multiple line segments by using one end point of the light entering opening as the start point, determining the slope and the end point for each line segment using the reverse tracing method and the iterative method and forming one curved line by the multiple line segments; and rotating the generating line around the axis of the reflector to obtain the reflective curved surface of the inner wall of the reflector.