In order to improve the light energy utilization of light-emitting diode（ LED）

a collimation system design method based on light control is proposed by using the refraction and reflection law of light and the edge ray theory in non-imaging optics. By controlling the path of each ray to find-internal refractive surface and side reflective surface of the discrete point coordinates of the plane cutting line in total internal reflection（ TIR） lens

and then the coordinate data is introduced into the three-dimensional modeling software to be fitted into a closed curve. Through rotation to get the entity

and introduce into optical simulation software for material and light source settings

through light tracing

obtain evaluation results of system. The simulation results show that the luminous efficiency of the collimation system on the receiving screen is 0. 89 and light beam divergence half angle is less than 5°.