The present invention is related to the development of briquettes using agro-wastes like wood saw dust, betel (areca nut) nut husk fiber and combustible industrial wastes like foundry carbon dust waste and transformer insulation paper waste, with enhanced calorific values with efficient combustion behavior. The uniformly shredded bio-wastes are dried under direct sun light over a period of two to three days. The shredded and dried bio-mass components with moisture content of about 10% were pelletized other conditioned combustible industrial wastes through the densification process using the temperature between 160°C and 220°C with applied pressure of about 5600 Psi. The hybrid bio-mass briquettes produced have the bulk density were ranged between 1 g/cm3 and 2 g/cm3 and that of the calorific values were ranged between 4000 Cal/g and 7000 Cal/g. The hybrid bio-mass briquettes produced have the percentage carbon content were ranged between 25% and 50% and that of the percentage moisture content were ranged between 5% and 10%. Similarly, the percentage ash content was ranged between 1% and 5%.