In the short-contact, high-temperature processes such as fluid catalytic cracking, the stripping efficiency is a critical factor significantly determining product yield. To improve the stripper performance, a large-scale cold experimental model is employed to investigate the hydrodynamic and mass transfer performance of a novel packing stripping column. In the experiment, air was used to simulate stripping steam. Fiber optic probes and tracer gas methods were employed to measure bubble characteristics, solid content as well as stripping efficiency under various operating conditions. The results indicated that the novel internal component effectively broke up the rising bubbles, reduced bubble size, and increased bubble frequency. Downstream of this component, it was found that the bubble size distribution became more uniform, the bubble frequency increased, and the radial solid retention gradient decreased. It improved gas-solid contact and enhanced fluidization uniformity. Based on analyzing the axial flow behavior, the strippers divided into three functional zones: the nature evolution zone, the forced crushing zone, and the recovery coalescence zone. The forced crushing zone was particularly significant as it suppressed bubble coalescence and enhanced mass transfer. The measured stripping efficiency exhibited a non-monotonic relationship to the superficial gas velocity. Efficiency peaked at 98% when the gas velocity was 0.22 m/s, corresponding to the smallest and the most uniform bubbles distribution, along with optimal gas-liquid contacting. Both excessively low and high gas velocities reduced efficiency due to limited contact or particle entrainment. The novel internal structure significantly improved the two phase flow and mass transfer, achieving a high stripping efficiency and providing practical data in optimizing and designing commercial stripping columns in catalytic processes.