Preparation method of heat-resistant halogen-free flame-retardant PC (polycarbonate)/ABS

The invention discloses a preparation method of heat-resistant halogen-free flame-retardant PC (polycarbonate)/ABS in the technical field of polymer modification. The preparation method comprises the following steps: uniformly mixing aromatic PC, a styrene type functional polymer, an impact modifier, an anti-hydrolysis stabilizing agent, an antioxidant, a lubricating agent, an anti-dropping agent and a flame retardant in an intermediate-speed mixer, and performing melt extrusion and granulation by virtue of a double-screw extruder to obtain a finished product. Compared with the prior art, a heat-resistant halogen-free flame-retardant PC/ABS molding object prepared by using the method disclosed by the invention has the advantages that the molding object is significant in advantages of impact performance and thermal performance, ensures that an environment-friendly concept is introduced into a formula design, and is simple in preparation process.