: In this research, polycarbonate/acrylonitrile-butadiene- styrene (PC/ABS) blends based on recycled materials were prepared with the ratio of 70/30 and some physical, mechanical and morphological properties of them were investigated. Because of these blends are partially miscible, the use of compatibilizer is inevitable. So for compatibilizing these blends, two different types of compatibilizers (ABS-g-MA with two different grafting degrees of 1.5% and 8% and EVA-g-MA with grafting degree of 1.5%) were used. The alloys were prapared by using a corotating and Intermeshing twin screw extruder with L/D of 40 and then each sample were granulated after extrusion with a pelletizer. Moreover, for doing the mechanical tests such as tensile and impact, the samples were injected by using an injection molding machine. In regard to the type of the chosen compatibilizers which have maleic anhydride groups on their chains, these compatibilizers are considered as the type of reactive compatibilizers. For preparing the samples, first, one sample is supplied as the control sample, without applying any compatibilizers and just contained the basic constitutive components of blends namely PC and ABS. For comparing the influence of using different compatibilizers on mechanical properties of these blends, the blends were prepared with the use of 3 phr, 5 phr and 10 phr of all compatibilizers (ABS-g-MA with grafting degree of 1.5%, ABS-g-MA with grafting degree of 8% and EVA-g-MA). The results show that the blend without any compatibilizer have higher melt flow index while, compatibilized blends have lower melt flow indexes and in these blends, by increasing the amount of compatibilizer melt flow index increased gradually. This phenomenon confirms better interfacial adhesion of components in compatibilized blends in comparison with uncompatibilized ones. Also, the use of ABS-g-MA as a compatibilizer had no significant effect on tensile strength of prepared blends. Moreover, the use of ABS-g-MA as compatibilizer led to increase the notched charpy impact strength of alloys. The maximum increase appeared for ABS-g-MA with grafting degree of 1.5% was about 1.5 times and for ABS-g-MA with grafting degree of 8% was about 1.9 times more than uncompatibilized blends. Also, the use of EVA-g-MA as a compatibilizer led to decrease in amount of tensile strength and the maximum decrease obtained with use of 10 phr of this compatibilizer and it was about 9%. This result may because of the rubbery nature of EVA. Moreover, the notched charpy impact strength of alloy with using EVA-g-MA as reactive compatibilizer, increased more than 2.6 times in comparison with uncompatibilized blend with use of EVA-g-MA by amount of 5 phr. Also, the scanning electron microscopy photomicrographs shows that the particle size of dispersed phase was decreased in continuous phase of polycarbonate. It should be noticed that the minimum size of dspersed particle size obtained with the use of EVA-g-MA. The results of differential scanning calorimetry tests show that the use of ABS-g-MA and EVA-g-MA as reactive compatibilizers led to shift in peaks of glass transition temperatures of PC and ABS that indicates good compatibility of these alloys in comparison with uncompatibilized blend. Keywords: polycarbonate, ABS, alloy, compatibilizer, recycle, mechanical properties