The invention relates to an automobile exhaust emission purification treatment fluid. The automobile exhaust emission purification treatment fluid is prepared from the following raw materials in parts by weight: trisodium phosphate, polyethylene glycol, industrial carbamide, sodium silicate, ethidene diamine, triethanolamine, glycerol, vanadium pentoxide, AEO-9, industrial salt, ethylene glycol, a macromolecular composite synergistic agent and water. The treatment fluid can be used for catalyzing nitric oxides discharged by automotive diesel engines and quickly decomposing the nitric oxides in the presence of a surface activity catalyst, thereby achieving the practical effect of purifying the emission at any time. By adopting the treatment fluid, the exhaust finally discharged in the air can reach the national standard; meanwhile, the treatment fluid is strong in adaptability and excellent in anti-freezing effect, so that the use effect of the treatment fluid at low-temperature state of severe cold areas is still not influenced.