Abstract: A treatment method of wastewater containing high-concentration boron includes steps as follows: pouring wastewater containing high-concentration boron into a PH value adjusting tank; pouring an alkaline solution into the PH value adjusting tank; pouring the wastewater containing boron into a boron-removing electrocoagulation tank, and an electric conducting electrolyte being provided for performing an electrocoagulation procedure; discharging sludge generated by the electrocoagulation procedure into a boron-contained sludge dewatering tank; outputting the wastewater containing boron into a first absorbing tank provided with a first absorbing material to perform an absorbing and filtering procedure; outputting the wastewater containing boron into a second absorbing tank provided with a second absorbing material to perform another absorbing and filtering procedure; and outputting the wastewater containing boron into a filtering tank to perform another filtering procedure for outputting the wastewater containing