generally in WPC manufacturing, virgin thermoplastic polymers are widely used. the most prevalent polymers are PE,PP,PVC and PS. waste and recycled plastics have been for manufacturing WPC in 1990s and the use has significantly increased in the developed and deverloping countries in recent years. this paper present a detailed review aboute and racycled plastics and the research published on the effect of recycled plastic on the physical properties of WPCs.