Abstract: This paper presents a constructional idea and operating conditions for a new type of gas-liquid reactor, the shelltube type of bubble-falling film tower. The tower is an improved design of both falling film tower and bubble column, in which two types of fluid distributors for tubes are installed; one is a liquid distributor at top of each tube like in the falling tower, the another is a gas distributor at bottom of each tube like in the bubble column. A combined operation of both falling film in upper half of the tube and gas bubbling in lower half of the tube has been realized through the using of two distributors as mentioned. The paper describes the experimental results of the hydrodynamics for tower in a single tube(φ16-φ36)and tubes(column φ200) in water-air system at atmospheric pressure. It is pointed out that the tower is characterized by the favorable operating performances: large gas-liquid treatment capacity, spacious operation flexbility, stable fluid conditions for gas-liquid stream, lower backmixing of liquid; therefore, it has the features of both bubble column and falling film tower. The essential data for designing have been presented by the experiments.