Electro-optic Q-switched Nd∶YAG solid laser with corner cube is realize by inserting a polarization beam splitter in cavity.By the modified rate equation,we come to a conclusion that the threshold inverted population,pulse peak power,pulse width and pulse energy change with the rotation of corner cube periodically.The Q-switched pulse is obtained experimentally,and the most pulse energy is as high as 190 mJ.By rotating corner cube,the pulses with different pulse width and pulse energy are obtained.The variation range of pulse width is 5.45 ns and that of pulse energy is 15 mJ,which is agree with the theoretical results.