The invention discloses an industrial sewage treatment system which is good in purifying effect and is capable of realizing acid-alkali decontamination on industrial wastewater. The industrial sewagetreatment system comprises a first grilling pond, a second grilling pond, a regulating pond, an oxidation pond, a first-stage precipitating pond, a first-stage acid treatment pond, a first-stage alkaline treatment pond, a second-stage acid treatment pond, a second-stage alkaline treatment pond, a neutralizing treatment pond, a second-stage precipitating pond, a disinfecting pond, a draining pond,a sludge consumption and concentration pond and a sludge dewatering system. By adopting the industrial sewage treatment system disclosed by the invention, the purifying cost can be reduced while a purifying effect of the industrial wastewater is increased.