In order to improve the signal to noise ratio of the system and reduce the false alarm rate, the structure type, correction of the image aberration and the image illumination uniformity were researched and analyzed. The telecentric and retrofocus structure was adopted. The system with the full field of view of 110°, the relative aperture of 1/3, and spectral range from 0.254 μm to 0.272 μm was designed. The analysis results demonstrate that the dispersion spot diameter is smaller than 53.7 μm, the relative distortion is smaller than 20% at 0.85 field of view, and the relative illumination uniformity is smaller than 15% .The structure is compact and feasible for ultraviolet warning camera.