Pretreatment process for production wastewater of EO-containing lithium battery electrolyte solvent

The invention relates to an EO-containing lithium battery electrolyte solvent production wastewater pretreatment process which comprises the following steps: firstly, adding acid into wastewater to enable the wastewater to be acidic with the pH value of 2-3, and heating to 50-60 DEG C; then, hydrogen peroxide is added into the wastewater, ozone is blown into the wastewater, and the ratio of the adding amount of the hydrogen peroxide to the mass content of EO is 1: (20-30); and finally, adding alkali into the wastewater, precipitating by using a flocculating agent, and removing the precipitate. The technical barrier that EO (toxic substances) in the lithium battery electrolyte solvent production wastewater cannot be biochemically degraded and COD is deeply degraded for pretreatment is broken through, the aim of the pretreatment process that the COD is smaller than 500 ppm can be achieved, and after pretreatment, the wastewater enters a biochemical treatment system for deeply removing COD, ammonia nitrogen and