Abstract:The characteristic of a continuouswave(CW) laser diode(LD) endpumped Nd:YVO4 crystal electrooptic Qswtiching with pulse repetition rate from 200 to 5000Hz laser is presented in this paper. With 10W of the incident pump laser,1kHz of pluse repetition frequency, Qswitching 355nm laser with average power of 15mW, pulse width of 20ns is obtained. And experimental results are briefly analyzed and discussed.