Polylactide (PLA) is considered a good alternative to fossil fuel based plastics as it is biodegradable and nontoxic to human. However PLA crystallize at a very low rate and has a relatively low melting temperature (Tm) in comparison with other commercial polymers. PLLA/PDLA stereocomplex has been expected to be potential high-performance polymer, because it shows its Tm at 220℃ which is 50℃ higher than homo-PLA. In this work, Thermal properties and crystallization behaviors of stereocomplex were analyzed by using DSC (Differential Scanning Calorimetry), WAXD (Wide angle X-ray scattering) and Polarized microscope. We could find that stereocomplex crystallites exhibit much higher spherulite growth rate. Also, thermal stability is maximized when a 50/50 blend is used.