In this study, electroless plating and pulsed electroplating were combined to prepare composite nano crystalline coating on the surface of CFRP composites. By the microstructure and X-ray diffraction analysis of the coating,the primary crystalline size is determine 50.6nm,and the crystalline grain size of the coating surface increases slowly with the increasing of the plating time, and the average increasing rate is 1μm per hour. By the measurement of the surface roughness, the value of Ra showes a 36% decreasing trend from initial machine coarsening to final pulsed electroplating. After chemical plating, the value of Ra is reduced from 1.55μm to 1.34μm, and after the pulse electroplating, the value of Ra is reduced from 1.34μm to 0.96μm.