The invention relates to a multifunctional environment-friendly asphalt flue gas purification system, which comprises a dust treatment tower, a filtered oil odor removing box, a main gas spray pipeline, a turbulent power-wave water film washing tank, a sedimentation oil-separation circulation pool and a plasma oil-smoke purification and waste-gas purification device. The multifunctional environment-friendly asphalt flue gas purification system integrates a physical purification technology for automatically separating waste gas, greasy dirt, dust and smoke with a plasma oil-smoke purification and high-pressure plasma waste gas purification technology, effectively overcomes the defect that the current treatment equipment cannot completely treat waste gas, greasy dirt, dust and smoke, eliminate odor in gas and decompose harmful macromolecular compounds at the same time, realizes automatic separation, recovery and reusing of various solid wastes during comprehensive waste gas treatment of one system, and ensures emission of gas reaching the standard without odor and pollution. The system has the advantages of scientific and reasonable structure, reliable work and stable performance, the wastes cannot product secondary pollution, and the exhausted gas cannot harm the human health. The system has strong practicality.