In order to reveal the influence of the pulsed laser shock effect on grain and its surface morphology of locally electrodeposited copper, one pulsed laser electrochemical composite deposition system is constructed, and the corresponding theoretical analysis and experimental verification are also performed. The shock effect in the deposition process is tested and the surface morphology of deposited samples is observed by scanning electron microscope. The results show that the interaction of the pulsed laser with the electrodeposition solution can refine the grain in local electrodeposition. In addition, as the laser energy increases, the deposited samples have more refined grains, broader width, smoother surface morphology and fewer air holes.