The invention relates to a reflecting device especially for improving light utilization efficiency and light intensity, decreasing the irradiation area, which comprises: a paraboloid reflector, xenon light source arranged on the focal point of the paraboloid reflector, and is characterized in that a spherical surface reflector with a translucent hole in center covers on the surface of the port ofthe paraboloid reflector. The center of the spherical surface reflector coincides with the focal point of the paraboloid reflector. The invention has a high light utilization efficiency. More than 99% light emitted from the xenon lamp transforms into parallel light and radiates out via the translucent hole. Such that, the parallel light has high intensity and far irradiation distance.