The invention provides a phosphate-graphene foam anode material and a preparation method thereof. The preparation method comprises the steps of preparing graphene hydrogel, preparing graphene foam, preparing phosphate-graphene gel precursor, compounding and performing thermal treatment, slicing and the like. The method is simple in technology and low in cost, and by utilizing graphene foam as a reactor and a load substrate of chemical synthesis of the phosphate anode material, the prepared anode material has excellent cycling performance and rate performance, is excellent in electrochemical performance, safe and reliable, and has a potential to be a novel lithium ion secondary battery anode.