This paper presents the pulsed laser eharateristics of laser NAB crystals grown in our institute. The maximum laser outpu t of a NAB rod with dimensions of 3. 2mm X 23. 7mm was 422mJ a pulse when it was pumped with a single xenon flashlamp. The laser threshold of a NAB crystal rod with dimensions of 1.8mmX 2.4mm was determined to be 67mJ. By using BDN dye for switching, the laser pulse width of a NAB rod with dimensions of 1.8minx8.4 mm was 8ns. The output laser beam was linearly polarized with beam divergence angle of about 2mrad and wavelength of A=1.063 μm.