With Cr:YAG as saturable absorber and output coupler, passively Q-switched microchip laser was obtained for laser diode (LD) end-pumped Nd:LuVO4 crystal. When the pump power was 13.86 W, a maximum average output power of 0.508 W was obtained, corresponding to an optical conversion efficiency of 3.6%, and a slope efficiency of 8.3%. The highest repetition rate, largest pulse energy and shortest pulse width were measured to be 23.95 kHz, 21.21 μJ, and 4.5 ns, respectively, corresponding to a peak power of 4.71 kW.