A dual-wavelength diode side-pumped Nd:YAG laser is generating intermittent laser action at the wavelengths of 1064 nm and 1319 nm was demonstrated. By this means, the population inversion is 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 is easily obtained. Furthermore, under different operation conditions, the ratio of the output powers can be controlled by changing the delay time. For the input current 22 A, the pulse repetition rate 4 kHz and the delay time 10 μs, the output powers are 6.2 W for 1319 nm and 5.1 W for 1064 nm, respectively. The numerical simulation of the performance of the dual-wavelength laser has been considered basing on the rate equations of intermittent oscillation dual-wavelength laser and the theoretical analysis corresponds to the experimental result.