Conventional lighting system used in visual chart projector have the disadvantage of high lamp-house temperature, high power, low projection lightness and asymmetry ray.To these traits, several kinds of il-lumination scheme were compared and analyzed according to the imaging theory in geometrical optics.And a new illuminating system has been designed.Moreover, the system lamp-house is a luminescence compounding of high lightness LED in this illuminate system with some excellence, for example, less glow, lower electric pow-er, higher lightness and more regular beam.