Abstract: A baffle tray tower comprising a tubular tower body, a plurality stages of baffle tray members disposed within the tower body, and partition plates each disposed within the tower body so as to generally vertically divide a curtain zone defined between two adjacent stages of the baffle tray members into an upper curtain zone for mainly passing a gas therethrough and into a lower curtain zone for mainly passing a liquid therethrough can be operated as a gas-liquid contacting device with a high gas-liquid contact efficiency and a low pressure loss.