The operating principle of digital micromirror device (DMD) is introduced. When the titled angle of a pixel mirror is set at +12\O or -12\O, it means that the optical transmissivity of this pixel is 0 or 1. With the help of the design method in binary panels, error diffusion method is used to spatially shape the 1053 nm laser pulse, which also realizes an initiative way of spatial modulation for laser pulse. Filling factor (FF) and field modulation (FM) are both factors which decide the quality of the near field laser beam and they directly affect energy availability factor of the high power laser system. In this experiment, FF increases from 33% to 65% and FM decreases from 52% to 28% after being shaped, and the size of the shaped beam is the same as we expected. At the end, the energy availability factor and mirror stability of this DMD are tested.