With the polarization-selective property of the resonance leaky-mode grating mirror, a 35-layer grating mirror with 1000 nm period and 70 nm groove depth is designed and manufactured. The corresponding sample is prepared through the micro-nanofrabrication process. The bi-reflectivity of the sample is measured by contrast method, and its reflectivity is about 87% for TE wave and 98% for TM wave, which proves its polarization selection at the central wavelength of 1064 nm, and that is agree with theoretical result. Then the grating mirror is placed in a NdYAG laser cavity as the end mirror, with which a linearly polarized TEM00 laser beam at 1064 nm is got, its degree of polarization is about 95.7% and power is 14.4 W with pump current of 20.1 A.