Based on geometrical optics and irradiance theory, a conic light-emitting diode array with uniform near-field lighting was analyzed. Formulas for calculating total irradiance from source to collecting screen was deduced. According to Sparrow′s criterion, the expression was calculated by using Matlab optimization toolbox. Furthermore, the software TracePro was used to simulate the designed array. The ray-tracing simulations showed that an array of light-emitting diodes assembled upon a conic surface can produce a wider angle distribution of light field than a flat array. The analysis and simulation of two-dimensional and three-dimensional of conic are carried out, and the uniformity of the illumination of the target is optimize. This method provided valuable reference to the LED lighting modules design.