Due toward the swift growing of population and transportation, the industries there may be depletion there in petrol and diesel fuels, so researchers look for alternative diesel substitute fuels. Which not will create in the least injury to the atmosphere and similarly it fewer in price. Hence biofuel is sole of the substitute fuels due towards their nontoxic, no Sulphur, less emission and higher oxygen content. The standing investigation work is agreed ready to study the performance, ignition then exhaust emission behavior of common rail direct injection (CRDI) compression ignition engine using the blended biodiesel (B10, B20, B30) with ceric oxide (CeO2) Nanoparticles. Biodiesel derived from raw grape seed oil promise be a substitute fuel for the conservative diesel combustible due to their parallel in physicochemical properties. Usage of nanoparticles for better performance, ignition then emission features to the biofuel. The Ceric oxide nano additives mixed with biodiesel blends by magnetic stirrer. The examination process was accepted away below the ensuing biofuel samples: 10% of biofuel mixed to 90% diesel (B10), 20% of biofuel mixed to 80% diesel (B20), 30% of biofuel mixed to 70% diesel (B30) and 100ppm ceric oxide nanoparticles added with each blend (B10, B20, B30). The experimental engine was functioned at constant compression ratio 17.5:1 then continuous speed on numerous load conditions 0%,25%,50%,75% and 100%. The test was concluded by compare, The performance and emission features of biofuel with performance and emanation characteristics of diesel. The CRDI engine harmful exhaust gas emission is reduced with increase biodiesel concentration