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The reduction stripping kinetics of Ce⁴⁺ by HEH/EHP was studied by a constant interfacial area cell with laminar flow. The effects of stirring speed, temperature, specific interfacial area, Ce⁴⁺ concentration in the organic phase, free extractant concentration in the organic phase, HCl concentration, and H₂O₂ concentration on the stripping rate were investigated. The control mode and control steps of stripping process were judged. The kinetic equation of stripping was derived. The mechanism of stripping process was discussed. The results show that the stripping process is controlled by both diffusion and interfacial chemical reaction. The apparent activation energy <i>E</i>_a was calculated using Arrhenius’s formula. The kinetic equation of Ce⁴⁺ reduction stripping is <i>R</i> = <i>k</i>[Ce⁴⁺]_(o)^1.08[HEH/EHP]_(o)^−1.03[H⁺]_(a)^0.99[H₂O₂]_(a)^0.53, and the apparent rate constant <i>k</i> is 10^−3.66 (mol^−0.57·L^0.57)/min.