The invention relates to a free edge material cutting line with an aramid core wire. The cutting line comprises an aramid core wire and a resin binder coating coated on the core wire, wherein the aramid core wire is aramid III. The cutting line is characterized in that the aramid yarn, instead of the steel wire, is used as a core wire and has the advantages of high strength, good toughness, high wear resistance, light weight, long service life and the like, also has good sand-carrying property when used for cutting hard and brittle materials and can obviously improve the cutting efficiency and the utilization ratio of the processed materials and lower the production cost.