Abstract: The short glass fiber (SGF) reinforced composites were prepared by the injection molding using acrylonitrile-butadiene-styrene copolymer (ABS) and the short glass fibers as the raw materials, styrene-maleic anhydride copolymer (SMA) and epoxy resin(EP) as the compatibilizer. The effects of compatibilizer on the mechanical properties and interfacial adhesion of the composites were investigated using SEM, dynamic mechanical analysis (DMTA) and mechanical measurement. It was found that the mechanical properties of SGF/ABS composites could be improved by the incorporation of SMA or EP. Compared to the composites without compatibilizer, the tensile strength, flexural strength and impact strength could be improved by 56%, 42% and 79% respectively for SGF/EP-SMA-ABS composites with 30% mass fraction of short glass fibers . SEM and DMTA reveal that the incorporation of SMA and EP could introduce great improvement to the composites.