A novel LD-pumped single-frequency micro-chip green laser is presented. By using the combination of short cavity and Loyt filter formed by Rochon prism and KTP crystal, a stable single frequency green laser is obtained with 60 mW output at 500 mW LD-pump. The optical-to-optical conversion efficiency is about 12%. The optical contact between components of the laser is adopted. This laser has the advantages of a compact structure and a low cost. This work has been supported by the Science Technology Foundation of Xiamen City (No. 3502Z20077010).