The present invention discloses a waste liquid processing system suitable for electroplating waste liquid, the waste liquid processing system comprises a magnetic stirring base for generating a magnetic field, a waste liquid storage tank, a micro electrolysis filler injection device and a filtering device, a stirring magneton is placed on the bottom of the waste liquid storage tank, the micro electrolysis filler injection device comprises a circular funnel containing a microelectrode filler, and four vibrators are arranged uniformly along the outer circumferential direction of the micro electrolysis filler injection device in intervals; first the microelectrolysis filler is added into an electroplating waste liquid for electrolysis processing of the electroplating waste liquid to achieve the purpose of degrading of organic pollutants; by arrangement of magnetic stirring base and placement of the stirring magneton in the waste liquid storage tank, the liquid in the waste liquid storage tank is stirred, so that the microelectrolysis filler is more uniformly distributed in the electroplating waste liquid, and rapid electrolysis reaction is promoted; by arrangement of a filter net in a filter tank, impurity particles in the waste liquid are filtered, and by filling of polymer resin in a receiving space between the filter tank and the filter net, impurities in the waste liquid are further adsorbed.