Abstract: In order to solve the problems of slow processing rate of nano composite electrodeposition, easy agglomeration of particles and poor surface quality of deposition layer, the method of building high energy pulsed laser-assisted nano composite electrodeposition was adopted. Laser irradiation was used to produce localized microregion agitation to alleviate the agglomeration of particles, accelerate the electrochemical reaction rate and improve the surface quality of deposition layer. After finite element simulation and experimental verification, the results show that, laser and electrochemical composing can obviously increase the rate of composite deposition, and the impact of laser can increase the binding of grain, and then promote the densification of the coating. At the same time, this impact can also reduce the agglomeration probability of nanoparticles and refine the coating grain. The research results will be helpful to the development of electrochemical machining technology.