The invention discloses a foamy copper-based lithium ion battery negative electrode material and a preparation method therefor. The preparation method for the battery negative electrode material comprises the following steps of 1) performing pretreatment of foamy copper; 2) performing preparation on Cu-MOF/foamy copper; and 3) performing calcining treatment on the Cu-MOF/foamy copper. The foamy copper-based lithium ion battery negative electrode material disclosed in the invention has a three-dimensional porous structure, large BET surface area, and high porosity, so that the contact area between an electrolyte and the negative electrode material can be enlarged; by virtue of the introduced conductive substrate foamy copper and Cu-MOF, quick charge transfer can be facilitated; by virtue ofincreasing of the carbon element doping amount, more available active sites can be provided for lithium ion storage; in addition, the volume expansion effect in the charging-discharging process can be relieved effectively, and high reversible specific capacity and high cycle stability are achieved; and the foamy copper-based lithium ion battery negative electrode material disclosed in the invention can be directly used as an electrode without a binder and a conductive agent, so that the electrode preparation process is simplified.