An electroplating wastewater treatment method, which adopts industrial waste red mud, agricultural waste straws and seawater to treat heavy metal ions in electroplating wastewater, the method includes steps of: (A) crushing the straws into particles, stirring and mixing the crushed straw particles with the electroplating water, and obtaining a mixture, wherein 40-50 g of straw particles are added into the each liter of electroplating wastewater; (B) mixing the seawater with the red mud, adjusting a pH value to 8.5-9.5, filtering after standing, and obtaining a filtrate for stand-by, wherein: a weight of the red mud which is added into the seawater is 200-300 g per liter seawater; (C) mixing the mixture in the step (A) with the filtrate in the step (B) through ultrasonic oscillation, standing, and then mixing through ultrasonic oscillation, and then filtering after standing; and (D) adjusting a pH value of the filtrate obtained in the step (C) to 7. The present invention comprehensively utilizes the red mud of
