A series of well-designed deflectors were placed on the tray-95 to improve the flow pattern. A phenomenon of multiple plug flow was observed in each liquid flow channel between two deflectors on the deflected tray-95. In compliance with the theoretical prediction, temperature profiles of the liquid layer on the tray were measured both vertically and horizontally by resistive thermal detectors. An oxygen desorption experiment was carried out, and the oxygen concentrations in the inlet and outlet liquids were detected by iodometry. Then the liquid-phase Murphree tray efficiencies (E-ML) were calculated. The results show that the well-designed and well-placed deflectors can obviously increase the tray efficiency by almost 30% under the same operating conditions.