NOVELTY - A non-degradable high-concentration chemical wastewater is introduced into a coagulation tank through a pipeline, saturated lime solution is added, pH value is adjusted to 7.5-8.5, 150-300 mg/L sodium carbonate and 2.5-5 mg/L iron sulfate are added and pH is adjusted to 7-8. 1-1.5 mg/L polyacrylamide and 3-5 mg/L flocculant are added, reacted and filtered. The resultant treated wastewater is sequentially introduced into a filter having pore size of 0.01-15 mu m, filter having pore size of 0.0001-0.01 mu m and filter having pore size of 0.0001 mu m or less.    USE - Treatment of non-degradable high-concentration chemical wastewater (claimed).    ADVANTAGE - The method enables efficient treatment of high-concentration chemical wastewater, by economical and environmentally-friendly process.    DETAILED DESCRIPTION - A non-degradable high-concentration chemical wastewater is introduced into a coagulation tank through a pipeline, saturated lime solution is added, pH value is adjusted to 7.5-8.5, 150-300 mg/L sodium carbonate and 2.5-5 mg/L iron sulfate are added and pH is adjusted to 7-8. 1-1.5 mg/L polyacrylamide and 3-5 mg/L flocculant are added, reacted, and precipitated, such that calcium and magnesium in the wastewater are reduced. The resultant material is introduced into a sludge dewatering device, waste is separated by filtering using multi-medium filter or sand filter, and suspended solid and colloids in water are removed. 1-10 Vol.%/vol.% degrading bacteria mixture is added, cultured for 20-30 hours in culture medium, centrifuged to collect cells, and maintained for 2 hours under pressure of 4-10 MPa. The resultant treated wastewater is sequentially introduced into a filter having pore size of 0.01-15 mu m, filter having pore size of 0.0001-0.01 mu m and filter having pore size of 0.0001 mu m or less. The flocculant is aluminum-iron and copolymer composite flocculant. An INDEPENDENT CLAIM is included for equipment for treatment of high-concentration chemical wastewater.