Polycarbonate (PC) is one of the most widely used engineering plastic with growing applications in automotive, electronics and electrical housing due to its high impact strength and clarity. However, the poor chemical resistance and processing limits its applications. This work produced new generics of PC and polyethylene terephthalate glycol (PETG) by blending on a twin screw extruder to enhance the chemical resistance and process ability of PC. Additionally, the blend still maintains transparency. The change of process ability were detected by melt flow index(MFI). It was found that the presence of PETG can significantly increase flow ability of the blends. Mechanical properties (Tensile properties and Izod impact strength) of the blend were investigated. Finally, the opimized composition of PC/PETG will be tested on chemical resistance.