The invention discloses a tongue-shaped floating valve tray. The tongue-shaped floating valve tray comprises a tower plate and a floating valve, wherein the floating valve is arranged on the tower plate; mounting holes are formed in the tower plate, and particularly, the floating valve comprises a valve cover and valve legs which extend from the edges of the two sides of the valve cover to the downside; more than two tongue holes which are arched upwards are formed in the valve cover and air current dispersion devices are arranged on another two sides of the valve cover; clamping blocks are arranged on the valve legs and are positioned in the mounting holes; and the air current dispersion devices resist against the upper surface of the tower plate under an assembly state of the floating valve. By using the high-efficient tongue-shaped floating valve tray, the dispersion of air current can be relatively fine and uniform, and the full contact between gas and liquid is achieved, so that the efficiency and the production capability of a tower body are improved; and meanwhile, because of high mechanical strength of the floating valve, the floating valve can be prevented from being deformed and dropped in a mounting and repairing process.