Removal of triclosan (TCS) in water has attracted increasing attention due to its high detection frequency and potential toxicity. In this study, porous TiO₂ nanotube arrays (TiO₂ NTA) was prepared as the reactive electrochemical membrane (REM) to adsorb aqueous TCS, and subsequently to degrade TCS in-situ (a regeneration process of TiO₂ NTA). Adsorption kinetics and thermodynamic of TCS followed pseudo-second-order model and Langmuir model, respectively. Compared with adsorption at 0 mL min⁻¹ (static adsorption), the initial adsorption rate and the maximum adsorption capacity increased 18.8-fold and 73.8-fold at 300 mL min⁻¹, respectively. The optimal equilibrium absorption capacity (per projected area of TiO₂ NTA) and the initial adsorption rate were 2042.92 mg m⁻² and 108.51 mg m⁻² min⁻¹, respectively. In the subsequently electrochemical oxidation process, 99.8% of the adsorbed TCS was degraded in-situ and TiO₂ NTA was regenerated simultaneously. TiO₂ NTA electrode maintained the stable removal performance of TCS during four adsorption-degradation cycles. The adsorption process was a complex combination of the hydrophobic interaction and electrostatic interaction with/without applied voltage at different pH value. The electrochemical degradation pathways of TCS on TiO₂ NTA were hydroxylation, disproportionation, dichlorination and cleavage of ether bond under the attack of electrochemical generated •OH and O₂•⁻. The flow-through sequential adsorption and electrochemical degradation (SAED) based on TiO₂ NTA REM were proved to be effective method to removal TCS in waters, especially for the water with low conductivity.