Polymer composites materials are those that don't seem to be degradable by naturally. These material can remain in earth for thousands of years. This leads to the accumulation of pollution to the environment. To address this problem, compound composites are packed with fibre, fillers and resins that are considered as natural sources arebio degradable. Among the assorted natural fibers, fibre fiber are targeted for its before and when pretreatment conditions to getting excellent fiber. In antecedent several researchers have founds varied fibers has been pretreated and that they get its properties and its applications. In this research, fiber is analyzed before and during pre-treating. The assorted pretreatment that appropriate for fiber are dispensed. Fiber is employed as reinforcement, Rice husk is employed as a filler materials and synthetic resin is employed as a matrix to fabricate composites by compression moulding ways and therefore the sensible board are fabricated. The fabricated sensible board are subjected to analyses by mechanical properties. The effects of pretreatment of fiber before and when pretreatment are determined and noted to study the investigation results. The obtained results are compared and therefore the best pretreatment are hand-picked on the idea of the properties of the fiber.