采用碳纤维（CF）制备CF增强聚碳酸酯/丙烯腈-丁二烯-苯乙烯共聚物（PC/ABS）复合材料，研究CF对PC/ABS复合材料的力学性能和热学性能的影响，以获得CF的最佳掺量。力学性能分析表明，随着CF质量分数的增加，CF增强PC/ABS复合材料的拉伸强度和弯曲强度不断提高，冲击强度先增大后减小。热学性能分析表明，随着CF质量分数的不断增加，CF增强PC/ABS复合材料的热变形温度不断提高，熔体流动速率（MFR）先增大后减小。CF的质量分数为15%时，CF增强PC/ABS复合材料的综合力学性能和热学性能最优，与未加CF的材料相比，拉伸强度、弯曲强度和冲击强度分别提高了134.7%、133.3%和69.6%，热变形温度提高了39 ℃，MFR提高了27.8%。

The article uses carbon fiber (CF) to prepare CF reinforced polycarbonate/acrylonitrile-butadiene-styrene copolymer (PC/ABS) composites, and studies the influence of CF on the mechanical and thermal properties of PC/ABS composites, in order to obtain the optimal content of CF. Mechanical property analysis shows that as CF increases, the tensile strength and flexural strength of CF reinforced PC/ABS composites continuously increases, while the impact strength first increases and then decreases. Thermal property analysis shows that with the continuous addition of CF, the heat deflection temperature of CF reinforced PC/ABS composites continues to increase, and the melt flow rate (MFR) first increases and then decreases. When the CF mass frction is 15%, the comprehensive mechanical and thermal properties of CF reinforced PC/ABS composites are optimal. Compared with the material without CF, the tensile strength, flexural strength, and impact strength are increased by 134.7%, 133.3%, and 69.6%, respectively, the heat deflection temperature is increased by 39 ℃, and the MFR is increased by 27.8%.