Extensive use of composite materials leads to an increase in waste materials. Therefore, it is necessary to find a proper way to recycle the composites. In this research, the powder waste of carbon-epoxy resin composites collected from the cutting and grinding process have been added into glass fiber reinforced phenolic resin composite during the preparation process in order to enhance some mechanical characteristics. Thermal behavior, tensile and flexural properties of adding powder composites have been analyzed. Results show that adding powder waste in a certain proportional range can improve the performance of the new composites.