Textile structures nowadays are widely used in technical application. Textile structures have many application areas because of their low density, low cost and high strength. Bi-axial warp knitted fabrics have excellent properties to improve the mechanical properties of composite structures because of various fiber direction opportunities. Glass fiber is the mostly used reinforcement material for composites. It is well known that glass fiber reinforced polymer matrix composites have good mechanical properties. At the present times, recycling of waste materials come into question. Traditionally, economics of recent research has enforced the research to focus on industrial waste materials. The aim of this study is to use waste materials for producing reinforced composite structures. Composite layers produced with bi-axial knitted fabrics, walnut's shell and thermoset polyester resin. Textile materials are used to improve mechanical properties of composite structure.