This work reported the impact of EDM process parameters during the machining of a Aluminum based hybrid metal matrix composite material. In the hybrid metal matrix composite the Aluminum 6061 is the base metal or matrix in which the Sic and Graphite are added in different composition as the reinforcements. The experimental design was planned by using the design expert 9.0.6 software. The pulse-off time, pulse-on time, peak current and applied voltage are the process parameters and the performance is measuring in term of SR (surface roughness), a cooper rode of 12mm Ø is used as the electrode. In design expert a mathematical model was developed to achieve a better performance (SR). From the experimental study we investigated that the SR is directly and mostly affected by Pulse-on time. By the process optimization we get a better condition of process parameters where we predict a better performance (SR) for further study.