NOVELTY - Manufacturing nanofiber anode active material having core-shell structure for lithium secondary battery, comprises (i) mixing lithium phosphate compound (I) as raw material and chelating agent in a solvent to obtain core viscous solution; (ii) mixing lithium transition metal oxide (II) as raw material and chelating agent in a solvent to obtain shell viscous solution; (iii) electrospinning by ejecting the core viscous solution and shell viscous solution through double nozzle to form nanofiber precursor; (iv) drying the nanofiber precursor; and (v) calcining dried nanofiber precursor.    USE - The nanofiber anode active material having core-shell structure is useful for manufacturing lithium secondary battery (claimed).    ADVANTAGE - The nanofiber anode active material having core-shell structure possesses very large surface area; and increased stability.    DETAILED DESCRIPTION - Manufacturing nanofiber anode active material having core-shell structure for lithium secondary battery, comprising (i) mixing lithium phosphate compound of formula (LiFe1-xMxPO4) (I) as raw material and chelating agent in a solvent to obtain core viscous solution; (ii) mixing lithium transition metal oxide of formula (Li(M')O2) (II) as raw material and chelating agent in a solvent to obtain shell viscous solution; (iii) electrospinning by ejecting the core viscous solution and shell viscous solution through double nozzle to form nanofiber precursor; (iv) drying the nanofiber precursor; and (v) calcining dried nanofiber precursor.    x = 0-1;    M = Ni, Mn, Co, V, Cr, Cu, Ti or Zr; and    M' = Mn, Fe, Co, Ni, Cu, Cr, V, Ti or Zn.    INDEPENDENT CLAIMS are also included for:    (1) nanofiber anode active material having core-shell structure prepared by the above method; and    (2) manufacturing lithium ion secondary battery comprising anode plate, cathode plate and electrolyte, comprising preparing anode active material and coating anode active material with current collector.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow-chart of manufacturing method of nanofiber anode active material having core-shell structure (Drawing includes non-English language text).