The zone-drawing (ZD) method was applied three times to the melt-spun poly(L-lactic acid) (PLLA) fibers of low molecular weight (M-v = 13,100) at different temperatures under various tensions. The mechanical properties and superstructure of the ZD fibers were investigated. The resulting ZD-3 fiber had a draw ratio of 10.5, birefringence of 37.31 x 10(-3), and crystallinity of 37%, while an orientation factor of crystallites remarkably increased to 0.985 by the ZD-1. The Young＇s modulus and tensile strength of the ZD-3 fiber respectively attained 9.1 GPa and 275 MPa, and the dynamic storage modulus was 10.4 GPa at room temperature.