With the maximum output power of LD2500mW end-pumped Cr∶LiSAF/ LBO crystals in a plane-curved cavity the 430nm laser was achieved. The crystal Cr∶ LiSAF was 1. 01mm length and doped with 2. 2at %. The fundamental power at 860nm is 53mW with the pumped power of 320mW. And through the type I critical phase matching of LBO intracavity frequency doubling ,the result of 0. 54mW at 430nm is obtained. The Pth is 101mW and the slope efficiency is 0. 14 %.