A new type of Nd∶glass laser resonator with high stability and high power output was designed and demonstrated. With the corner cube array as the cavity mirror and the flat glass as the output mirror, the Nd∶glass laser outputs 1.06 μm laser pulse with pulse energy more than 450 J, the beam divergent angle about 0.6 mrad, and the electro-optic efficiency of 2.1%. The beam spots collected in the experiments are not a series of small beam spots with equal amplitude but a high intensity spot in the middle with many small spots around it. The experimental results are explained and discussed. The idea of laser beam coherent combination using the corner cube array is brought forward.