The present invention discloses an efficient automobile exhaust gas treatment system. The whole exhaust gas treatment device is of a cylindrical structure, and comprises a connecting sleeve, a carbonmonoxide generation chamber, a dust removal chamber, a three-way catalyst chamber, a smoke combustion chamber and a water seal arrangement which are successively connected, and a cylindrical silencinglayer sleeving at the outer side. A plurality of catalyst rods and carbon rods are disposed in the carbon monoxide generation chamber at intervals. A particle storage box is disposed below the dust removal chamber, and a gas outlet of the dust removal chamber is provided with a filter screen. Three-way catalyst TWC rods are disposed in the three-way catalyst chamber. The whole smoke combustion chamber is of a Z-shaped structure, and comprises a taper-shaped gas guide section, a combustion section and an exhaust section. The bottom of the water seal arrangement is provided with first inclinedwater insulation baffle plates, the top of the water seal arrangement is provided with second inclined water insulation baffle plates, and the top of the water seal arrangement is provided with a strip-type water filling port and gas outlet side by side. An internal surface of the taper-shaped gas guide section is coated with a hydrophobic coating. Automobile exhaust gas is purified by using a chemical reaction method, and the device is high in practicability and safety.