Abstract: This paper studies the spectral narrowing technology for the optical pumping XeF(C-A) bule-green laser with surface discharge. Two types of resonators, spectral overlapping resonator and grating resonator are used to compress the laser spectrum. A pectral linewidth of about 7 nm can be obtained when the spectral overlappting resonator is used, and the laser output energy is about 750 mJ. Narrow-linewidth tunable laser output is realized by grating resonator, with a spectral width of about 1 nm and a tunable range from 470 to 495 nm.