Abstract: Polylactide(PLA)/polycaprolactone(PCL) blends were prepared by using lactide-caprolactone copolymer(LACL) through a solution-blending method. Morphologies and crystallization behavior of the resulting blends were characterized by scanning electron microscopy and differential scanning calorimetry. The results indicated the dispersed phase exhibited a dramatic decrease in size with the addition of 5 % LACL. The crystalline capability of PLA molecules was greatly enhanced by PCL, thus resulting in a decrease in crystallization temperature. The crystallization temperature of PLA domain in PLA/PCL/LACL ternary blends was further reduced due to compatibilizing effect of LACL. The crystallization activation energies of PLA domain presented a decrease due to the presence of PCL and LACL on the basis of the calculation results derived from Kissinger’s model.