The invention relates to the field of carbon materials, in particular to a preparation method of a pantograph carbon contact strip material. The preparation method comprises mixing kneading, molding, first roasting, impregnating and secondary roasting. During mixing kneading, the aggregate is electrolytic graphene with a particle size of 30-45nm, semi-reinforcing carbon black with a particle size of 40-55nm and needlelike petroleum coke. The binder is medium temperature pitch, and the impregnating agent is impregnating pitch. Specifically, the particle size of the electrolytic grapheme is preferably 35-45nm, more preferably 36-42nm, and most preferably 40nm; and the particle size of the semi-reinforcing carbon black is preferably 50-65nm, more preferably 55-62nm, and most preferably 60nm. The carbon contact strip material prepared by the method provided by the invention has physico-chemical performance indexes comparable to other carbonaceous materials, can replace other carbonaceous materials to produce pantograph carbon contact strip materials, and has the advantages of wide raw material sources, low price, relatively simple preparation process, low technical difficulty, low production cost, and high product performance.