Poly(L-lactide)／poly(DL-lactide)(PLLA/PDLLA) blends were prepared hy co-solution precipitation．They were molded into φ 3.2 mm rods by a method of fibrillated compression. The crystallization and miscibility of the blends were studied using differential scanning calorimetry(DSC)．The results showed that the PLLA component can crystallize in the process of co-solution precipitation．The melting temperature(Tm) and crystallinity (Xc) of PLLA component are identical with those of the pure PLLA until the content of PDLLA in the blends up to 30％；however

they are decreased obviously for the blend containing 50％ PDLLA．The Tm and Xc of the PLLA component in the rods scattered significantly and this may be attributed to their inconsistency in preparation．It was found that two glass transitions corresponding respectively to PDLLA and PLLA occurred in DSC heating scannings of the blends．This may indicate that PDLLA and the non-crystalline PLLA in the blends are immiscible．