A laser diode-pumped all-solid-state narrow linewidth sodium guide star laser was developed. The repetition rate was 400 Hz and the average power was 1.0 W. Two acousto-optic (AO) Q-swithed lasers of 1064 nm and 1319 nm were used as basic-frequency lasers ,and then 589 nm sodium guide star laser was generated through a extra-cavity sum-frequency generation (SFG) lithium triborate (LBO) crystal. The efficiency of sum-frequency generation was about 20%. Each of the basic frequency lasers was adopted well-designed etalons to narrow the linewidth. The linewidth of the 589 nm laser was controlled to about 1.8 GHz. The central wavelength was locked to 589.159 nm(±1 pm) by tuning the temperature and angle of the etalons. In the end, the sodium guide star laser’s spectra was exactly matched to the D2 line of the sodium atoms.