The high energy pulse width tuning 1 064 nm solid-state laser was developed by adopting MOPA laser source and combining the traveling wave amplification of xenon-lamp pumping. The pulse signal out of MOPA fiber laser was controlled by the method of electric modulation pulse width. Under the premise of ensuring high beam quality, a 1 064 nm laser source output with pulse width of 8.6-220.9 ns was achieved. Adopting double pass amplifier design, five-step travelling wave amplification was achieved by xenon lamp pumping Nd:YAG crystal. The technique of restraining self-oscillations and the reasons of narrowing pulse width in the process of traveling wave amplification were analyzed. When the inject energy of xenon-lamp was 60 J and the repetition rate was 10 Hz, a 1 064 nm laser output with pulse width of 4.2-173.3 ns was achieved. Single pulse energy was up to 158 mJ.