Pretreatment method of industrial wastewater in composite sewage treatment plant

The invention discloses a pretreatment method of industrial wastewater in a compound sewage treatment plant, which is applied to the field of wastewater treatment and comprises the following steps: firstly, removing suspended solids and impurities in the industrial wastewater by using a coarse screen and a fine screen; then, performing detoxification treatment on organic matters in the industrial wastewater by adopting an advanced oxidation method; and finally, carrying out degradation treatment on organic matters in the industrial wastewater by adopting a hydrolytic acidification method. According to the method, an advanced oxidation method and a hydrolytic acidification method are combined, so that the effects of enhancing advantages, avoiding disadvantages and complementing advantages are achieved. The poison inhibition effect of the wastewater on microorganisms in hydrolytic acidification is greatly reduced and even eliminated by the previous advanced oxidation method, and refractory substances can be fur