NOVELTY - Forming biofuel based on treated waste vegetable oil with catalytic cracking method involves: i) purifying waste vegetable oil by dehydrating oil, solid residues and other contaminants to obtain purified waste vegetable oil; ii) catalytic-cracking purified oil by subjecting to cracking in fixed-layer catalytic cracking device for generating gas and steam mixture; and iii) condensing and separating mixture emitted from device for providing two separated liquid and gas phases, where liquid phase is transferred to fraction-distillation device and gas phase is introduced to separating device.    USE - As process for manufacturing biofuel based on treated waste vegetable oil with a catalytic cracking method (claimed).    DETAILED DESCRIPTION - A process for manufacturing biofuel based on treated waste vegetable oil with a catalytic cracking method, involves: i) purifying waste vegetable oil by dehydrating the waste vegetable oil, solid residues and other contaminants to obtain purified waste vegetable oil; ii) catalytic-cracking the purified waste vegetable oil by subjecting the purified waste vegetable oil to the catalytic cracking in a fixed-layer catalytic cracking device for generating gas and steam mixture; and iii) condensing and separating the gas and steam mixture emitted from the catalytic cracking device for providing two separated liquid and gas phases, where the liquid phase is transferred to the fraction-distillation device for being split into base oil fractions having the boiling-point range respective to the petroleum fraction, diesel fraction, kerosene fraction, and the gas phase is introduced to the separating device for being separated into light fractions respective to the liquefied petroleum gas (LPG) fractions C3, C4, dry gases including H2, CO, CO2, CH4, C2H6, C2H4 and N2 for being recovered to the reaction tower. The cracking catalyst is selected from zeolite Y, zeolite ZSM-5, composite ZSM-5/MCM-41, composite Y/MCM-41, A1-SBA-15, or composite ZSM-5/SBA-15, Al2O3.