The power tuning characteristics of laser diode end pumping dual-wave length laser with combined gain medium are studied.The results show that the waist position of pu mp beam in combined gain medium and the temperature of gain medium are important factors af fecting the relative power ratio of the dual-wavelength signals.When the pump beam waist position i s fixed,the different change rate of the emission cross section of gain medium will cause the relative power of the dual- wavelength signal to change with temperature.The experiments show,for the com bined gain medium dual-wavelength laser with specific parameters,when the pump power is 3 W,and the pump beam waist position is 1.5 mm in the gain medium,the heat sink temperature rises fro m 5 ℃ to 32.3 ℃,the output dual-wavelength signal achieves power balance,and the total output powe r is 435 mW.The experimental results are in good agreement with the theoretical simulation.