In this paper,a two-mirror resonant cavity was used for the Q-switched dual-wavelength operation of Nd:GdVO4 at 1063nm and 1342nm.Red and green lights were achieved by using PPLT and KTP as the harmonic generation crystals.When the incident pumping power was 14W and the pulse repetition rate was 15kHz,average output power of 587mW at 1063nm,1.13W at 1342nm,703mW at 532nm and 328mW at 671nm with the respective pulse durations of 23 ns,55ns,18 ns and 43ns for quasi-cw operation were obtained.