1319 nm waveband sets in the window of air transparency and the low lossness of fiber, and it approaches to zero dispersion. It has been widely used in many fields, and has attracted much attention. The transition radiation energy level of the 1319 nm is analyzed. The critical technology of restraining resonance of 1064 nm so as to improve that of 1319 nm is discussed. A pulsed output static energy of 340.9 mJ at 1319 nm, Q-switched output energy of 76.8 mJ with pulsed-width of 17 ns and divergence of 2.7 mrad are acquired. Experimental results show that coating chosen-film can be used to generate the laser at 1319 nm.