The oscillation condition for the simultaneous dual-wavelength operation and sum-frequency mixing in a diode-end-pumped Nd∶YAG solid-state laser is studied. A dual-wavelength continuous wave (CW) diode-end-pumped Nd∶YAG laser that generates simultaneous laser action at the wavelength 1064nm and 946nm is demonstrated. Then by use of intracavity sum frequency mixing in LBO crystal ,CW 500. 8nm radition is achieved.