The high-speed tower with large flux can effectively reduce the diameter of the tower body and save the producing expenditure, which is an important development direction of the tower.Since the operating point of the tower is usually above the entrainment line, a new structure combined with high efficiency gas-liquid separation method is proposed.Through CFD numerical simulation method, the principle of the new collisional gas-liquid separation structure is analyzed,the influence of structural parameters on the separation effect is calculated, and the structure is optimized.Based on the CFD analysis results, an experimental platform is built to study the hydraulic performance of the new high-speed tower.The results show that: (1) the more layers of components, the narrower the horizontal spacing and the narrower the vertical spacing, the better the separation efficiency of the collisional separator, but the stronger the drag drop.(2) Considering the comprehensive efficiency, pressure drop and space utilization, when the number of element layers is 2, the ratio of horizontal spacing to width is 1.0, and the ratio of vertical spacing to width is 0.5, the effect of the whole collisional separator is the best.(3)When the gas flow rate is a fixed value, it shows that changing the liquid phase flow rate has no significant effect on the pressure drop of the tray;when the liquid phase flow rate is a fixed value, the pressure drop of each layer of the tray increases with the increase of the gas flow rate significantly.(4) Changing the liquid flow rate has no obvious effect on the leakage line and entrainment line,and the operation range is wide, and the operation flexibility is 75%.Therefore, compared with the traditional cyclone tower, the new high-speed tower has the advantages of small diameter, large processing capacity, high gas-liquid separation efficiency and wide operation range.It can effectively reduce the cost, improve the space utilization ratio and has a wide range of application prospects.