An unmanned aerial vehicle（UAV） landing guidance system based on solar-blind ultraviolet imaging is designed to meet the demand of precise pose parameters of fuselage to the landing sites. The system utilizes a solar-blind UV imaging system with dual channel and a UV beacon consisted of several sources, which is imaged by the ultraviolet-channel imaging system, and the spot position of UV beacon is extracted based on light intensity. Camera perspective projection model and direct linear transformation algorithm are adopted to solve the initial pose parameters. The accurate pose parameters of UAV to the UV beacon are obtained by the iterative optimization, which guides UV safely landing. Because of the uniqueness of solar-blind ultraviolet near the ground, the advantages of system in poor visibility conditions are particularly obvious. Experimental results show that the relative accuracy of range location can reach 0.5% and the absolute accuracy of angle location is better than 1°. The proposed system can meet the requirements of UAV landing guidance.