The frequency excursion of laser source of Doppler lidar should be less than 1 MHz. To satisfy this demand, a confocal Fabry-Perot (F-P) interferometer was manufactured as the frequency standard for frequency stabilization. After analyzing and contrasting the center frequency excursion of confocal Fabry-Perot interferometers that are made of three different types of material with the change of temperature, the zerodur material was selected to fabricate the interferometer, and the cavity mirrors were optically contacted onto the end of spacer. The confocal Fabry-Perot interferometer was situated within a double-walled chamber, and the change of temperature in the chamber was less than 0.01 K. The experimental results indicate that the free spectral range is 370 MHz, the full-width at half maximum (FWHM) is 1.7 MHz, and the finesse is 220. Using this interferometer as frequency standard of frequency stabilization, the theoretical frequency excursion is 0.15 MHz, which satisfies the need of frequency stabilization of single mode laser of Doppler lidar.