通过偏光显微镜研究了不同组成聚丙烯（ＰＰ）与不同表面处理单丝玻璃纤维（ＧＦ）界面上结晶形态的变化。在玻纤采用含胺硅烷偶联剂处理，基体ＰＰ中加入酸酐类改性聚丙烯（ＭＰＰ）时，由于界面上化学键结合及冷缩产生界面应力的作用，从而导致在通常物理结合和弱化学键结合情况下不能产生的横晶出现。通过广角Ｘ射线衍射分析发现，ＭＰＰ的加入虽然使ＰＰ的结晶度有所提高，但却未改变其晶型。 The changes of the crystalline morphology at the interface between different composition polypropylene (PP) and different surface treated monofilament glass fibers (GF) were investigated by polarized light microscope. When glass fiber is treated with amine-containing silane coupling agent and anhydride-modified polypropylene (MPP) is added to matrix PP, the interface stress is caused by chemical bonding and shrinkage at the interface, which leads to the physical bond and weak chemical bond The combination of circumstances can not produce horizontal crystal appear. By wide-angle X-ray diffraction analysis found that although the addition of MPP PP crystallinity has increased, but did not change its crystal form.