Composites find significant uses in domestic and infrastructure industries through recent advances in materials. In recent years, natural fiber based epoxy resin composite has become important as important industrial resources, given their superior material properties and decomposability. This research is based on the mechanical characteristics of composites using bananas and coir fibers added with ash particles. The evaluation of the Mechanical Property is based on the NABL-approved ASTM Standards. For composites, including compression moulding, spray operation, pultrusion, hand layup, there are various manufacturing techniques available. The easiest way to do this work is to lay hands. Such composites are generated in terms of fiber length and volume fraction as specific combinations. The fiber treatment using an alkaline solution of 1% NaOH is used to reduce decomposability and to increase lifetime chemical therapy. Mechanical measures such as tensile examination, flexural check, and impact studies can research the effect of the ash particle percentage. Mechanical properties have been shown to be significantly improved.