With the optimized sidely pumped module structure,three laser diode arrays rotating symmetrically pump the Nd:glass rod. The size of the Nd:glass rod is 2 mm×75 mm,with the doping concentration of 4% atom fraction. The end surfaces of the rod are coated with antireflection film with high of 99.8% at 1053 nm,and the rod is tilted 1.5°in order to eliminate the oscillation of amplified spontaneous emission (ASE). With collective cooling,generated heat is cleaned away by deionized water flowing in the heat-sink. The seed,with energy of 10 μJ,operating frequency of 1 Hz,pulse width of 3 ns,output wavelength of 1053 nm,through the Nd:glass amplifiers reaches 70 times stable high-gain when the pump power is 8.2 kW and the pulse width is 400 μs. Meanwhile,the fluorescence distribution of the amplifier is homogeneous. Comparing the pulse oscillogram before and after amplification,there was no distortion in the amplified waveform.