为提升聚碳酸酯/丙烯腈-丁二烯-苯乙烯共聚物（PC/ABS）合金的阻燃性能，采用复配协效的方法探究阻燃配方体系。以PC/ABS复合材料的极限氧指数（LOI）和垂直燃烧等级（UL-94）为主要考察指标，构建了以二乙基次膦酸铝（ADP）为主体阻燃剂，9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）为协效阻燃剂的二元阻燃配方体系。将PC/ABS和二元阻燃体系混合，制备了PC/ABS/二元阻燃剂复合材料。通过UL-94垂直燃烧测试、氧指数（LOI）测试、力学性能测试、锥形量热测试和热重分析测试等表征方式，研究PC/ABS复合材料的阻燃性能、力学性能、燃烧特性和热稳定性。结果表明：当ADP与DOPO的质量比为3∶1，二元阻燃配方体系总添加量为15.0%时，PC/ABS复合材料具有优异的阻燃性能、力学性能、燃烧特性和热稳定性。

In order to improve the flame retardancy of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) alloy, the flame retardant formula system was explored by the method of compound synergy. Taking the limiting oxygen index (LOI) and vertical combustion grade (UL-94) of PC/ABS composites as the main indexes, a binary flame retardant formula system with aluminum diethylphosphinate (ADP) as the main flame retardant and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) as the synergistic flame retardant was constructed. PC/ABS/binary flame retardant composites were prepared by mixing PC/ABS and binary flame retardant systems. The flame retardancy, mechanical properties, combustion characteristics and thermal stability of PC/ABS composites were studied by UL-94 vertical combustion test, oxygen index (LOI) test, mechanical property test, cone calorimetry test and thermogravimetric analysis test. The results show that when the mass ratio of ADP to DOPO is 3∶1 and the total addition amount of binary flame retardant formula system is 15.0%, PC/ABS composites have excellent flame retardancy, mechanical properties, combustion characteristics and thermal stability.