A kind of all‐solid‐state continuous‐wave single frequency dual‐wavelength lasers delivering high power low‐noise radiations at 671 and 1342 nm was designed and fabricated. To lower the laser noise and obtain dual‐wavelength laser outputs, the resonator length was optimized and an LBO crystal was adopted for intracavity second harmonic generation. Under 47 W pumping, 3.17 W laser at 671 nm and 2.15 W laser at 1342 nm were obtained simultaneously. The power and frequency fluctuations of the 671 nm laser in a given 4 h were better than ±0.55% and ±50 MHz, respectively. The power and frequency fluctuations of the 1342 nm laser in a given 4 h were better than ±0.60% and ±25 MHz, respectively. The intensity noises and the phase noises of both the 671 and 1342 nm lasers reached the shot noise limit beyond the analysis frequency of 2 MHz.