The invention discloses an electroplating wastewater processing technology and a special-purpose apparatus thereof. The electroplating wastewater is divided into chromium-containing waste water, nickel-containing waste water, cyanogen-containing waste water and comprehensive waste water, and then is subjected to classified processing, the technology is characterized in that the chromium-containingwaste water is respectively subjected to reduction and coagulating sedimentation, and then is introduced into a middle mixing system; the nickel-containing waste water is subjected to oxidation complex breaking, coagulating sedimentation, and deep processing, and then is introduced into the middle mixing system; the cyanogen-containing waste water is subjected to oxidation cyanogen breaking, is introduced into a coagulating sedimentation system after being mixed with the comprehensive waste water, and after coagulating sedimentation, is introduced into the middle mixing system for mixing to obtain the mixed waste water. The mixed waste water is subjected to reverse osmosis membrane separating, and the obtained produced water can be reused. A concentrate is subjected to evaporative crystallization, and crystalline salt can be finally obtained. The electroplating wastewater processing technology can be recyclablely used for a production line, and the obtained crystalline salt can be recycled.