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An alternately intermittent oscillation technique was proposed and an intermittent oscillation dual-wavelength diode side-pumped solid-state laser has been set up. The model of rate equations of intermittent oscillation dual-wavelength laser has been considered. By this means, the population inversion was distributed efficiently, mode competition of both laser lines can be avoided, the effect resulted from the accuracy of the coating process can be reduced and the stable output of dual-wavelength was easily obtained. What is more, for different operation condition, the ratio of the output powers can be controlled by changing the delay time, so it is very beneficial to all-solid-state RGB lasers.