In the current work epoxy resin is chosen as matrix, treated Sacharum offinarum (SugarCane) fiber, Pennisetum typhoides (Jowar) filler is chosen as reinforcement. Room temperature cured Epoxy System filled with Sacharum offinarum fiber and Pennisetum typhoides (Jowar) filler is synthesised by mechanical shear mixer, then kept in a Ultra sonic Solicitor for better dispersion of Pennisetum typhoides (Jowar) filler in the matrix. Different weights of modified Pennisetum typhoides (Jowar) filler (1,2,3,4,5 gm wt) has been incorporated into the Epoxy matrix in order to study the variation of Mechanical and Thermal properties.