A compact diode-pumped passively Q-switched SrWO₄Ra man laser is presented with a simple linear cavity.An efficient Cr⁴⁺:YAG crystal is used as the saturable absorber.St able and high conversion efficiency first-Stokes light is realized and its polarization is studied.A maximum pump o utput power of 968mW is obtained at an incident pump power of 5.8W,corresponding to an overall pump light-first-orde r Stokes conversion efficiency of 16.7% and a slope efficiency of 18.6%.The Q-switched pu lse with repetition rate of 49kHz and pulse width of 7ns is obtained.The obtained diode-to-Stokes conversion efficiency is much higher than those of previously reported diode-pumped passively Q-switched intracavity Raman lasers.High efficiency will help to achieve the sum-frequency process or double-frequency process.It is very significant to i mprove conversion efficiency of the diode-pumped passively Q-switched SrWO₄Raman laser.