Hexagonal-LiMnBO3/C composite was prepared by the wet impregnating method using the 3D-network ketchen black (KB) as both temple and conductive framework. The crystal structure, morphology and specific surface area were characterized by X-ray diffraction, scanning electron microscopy and nitrogen sorption measurements, respectively. The electrochemical properties of the composite were studied by galvanostatic charge/discharge and cyclic voltammetry measurements. When tested at C/20 rate for Li ion insertion/extraction properties, LiMnBO3/C composite exhibits good cycle capability with discharge capacity retention of 87.4% at the 30th cycle. As the current rate increases from C/20, C/10 to C/5, good rate capability was obtained for all rates with initial discharge specific capacities of 138.8, 124.5 and 100.5 mA h g-1, respectively.