An electroplating wastewater treatment method includes steps of: (A) crushing the straws into particles, stirring and mixing the crushed straw particles with the electroplating wastewater, and obtaining a mixture, wherein 40-50 g of straw particles are added into each liter of the electroplating wastewater; (B) mixing the seawater with the red mud, adjusting a pH value in a range of 8.5-9.5, filtering after standing, and obtaining a filtrate, wherein: a weight of the red mud which is added into the seawater is 200-300 g per liter seawater; (C) ultrasonically mixing the mixture in step (A) with the filtrate in step (B), standing, and then ultrasonically mixing, and then filtering after standing; and (D) adjusting a pH value of the filtrate obtained in step (C) to 7.
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