Copper was a widely used catalyst for graphene synthesis by chemical vapor deposition(CVD),whose surface quality has great influence on the graphene quality.Electrochemical polishing was an important method of pre-treatment of the metal surface morphology.In this paper,we comprehensively discussed the relationship between process parameter of electrochemical polish with surface morphology and graphene quality.It was found that,compared with the graphene grown on the unpolished copper foil,the qualities of t...