Carbon-coated LiMnVO4 nanomaterials with different carbon mass fraction were synthesized by a combined sol-gel reaction and hydrothermal process, using LiAc•2H2O, Mn(Ac)2•4H2O, V2O5 and H2O2 as raw materials and glucose as carbon source. The morphology and structure were characterized by SEM、TEM、XRD、Raman、EDS、TG. The results indicated that the as-prepared samples presented cubic crystal structure, and had good dispersibility after carbon coated. Electrochemical measurement results confirmed that carbon-coated LiMnVO4 nanomaterials with different carbon mass fraction (0%, 5%, 10% and 15%) as anode materials for LIBs delivered initial reversible capacities of 682, 686, 696 and 580 mAh/g under the same conditions, remained 226, 336, 513 and 440 mAh/g after 60 cycles. Hence, carbon-coated LiMnVO4 nanomaterials with 10% carbon mass fraction have better cycling stability and higher reversible capacity than others．The appropriate carbon mass fraction not only increases the interface stability of nanomaterials, inhibits the growth and agglomeration of grains, but also improves the electronic conductivity of composite electrode materials.