利用ＤＳＣ研究ＰＢＴ／ＰＰ／ＰＰ－ＭＡＨ三元共混体的结晶性质，结果表明：ＰＰ和ＰＢＴ相互影响分别结晶。在ＰＰ结晶过程中，ＰＢＴ起异相成核剂作用，使ＰＰ结晶速率增大，ＰＰ的Ｔｍ下降，Ｔｃ升高；而在ＰＢＴ的结晶过程中，ＰＰ的熔体起稀释剂的作用，促进ＰＢＴ结晶成核过程，使ＰＢＴ的Ｔｍ下降，Ｔｃ升高。ＰＰ－ＭＡＨ的加入，阻碍了ＰＰ大分子链向晶核的移动，同时改善了共混体的相容性。甚至在较大的ＰＢＴ加入比例（２８％）下，仍能促进协同效应和共同结晶。 The crystallization behavior of PBT / PP / PP-MAH ternary blend was studied by DSC. The results showed that the interaction between PP and PBT were respectively crystallized. In the process of PP crystallization, PBT acts as a heterophasic nucleating agent, increasing the crystallization rate of PP, decreasing the Tm of PP, and increasing the Tc. In the crystallization process of PBT, the melt of PP plays a role of diluent and promotes PBT crystallization nucleation process, PBT Tm decreased, Tc increased. The addition of PP-MAH hinders the movement of PP macromolecular chains to the nucleus and improves the compatibility of the blends. The synergistic effect and co-crystallization can be promoted even with larger PBT additions (28%).