用低密度聚乙烯接枝二烯丙基双酚Ａ醚（ＬＤＰＥｇＤＢＡＥ）作为高密度聚乙烯／聚碳酸酯（ＨＤＰＥ／ＰＣ）共混体系的增容剂，研究了其对ＨＤＰＥ／ＰＣ共混体系的影响．通过共混物形态观察、热力学性能测试和结晶性分析，发现ＬＤＰＥｇＤＢＡＥ对ＨＤＰＥ／ＰＣ共混体系有良好的增容效果．并发现了增容剂在共混物中的最佳用量为１０ｐｈｒ，提高增容剂的接枝率更有利于改善共混物的性能 The low density polyethylene grafted diallyl bisphenol A ether (LDPE  g  DBAE) as high-density polyethylene / polycarbonate (HDPE / PC) blends compatibilizer, its HDPE / PC blends. Through the observation of morphology, thermodynamic properties and crystallinity analysis, it was found that LDPEgDBAE has good compatibilization effect on HDPE / PC blends. And found that the optimal amount of compatibilizer in the blend was 10phr. Increasing the graft ratio of the compatibilizer is more beneficial to improve the performance of the blend