The utility model relates to a light reflection safety warning mark which is a component in the shape of a triangular plate. A fluorescent layer is spread on the surface of the light reflection safety warning mark, red light reflection sheets 2 are attached to part width of all edge strips, a rotating bottom seat 3 can be additionally arranged on the bottom edge strip, and both ends of the bottom edge strip are provided with support feet 6 which jointly support the light reflection safety warning mark to form vertical state. The utility model is put at warning places. The three edge strips of the triangle can be made into three components which are mutually pivoted. The two upper edge strips can be rotated to the overlapping position of the bottom edge strip, which is convenient for storage. The light reflection safety warning mark can be clearly seen during daytime, and the light reflection sheets flicker and reflect light under the irradiation of light during the night. The utility model has an obvious warning function, and can be arbitrarily moved to required positions. Foldable structure is convenient to store and carry.