The invention discloses an automatic installing machine for a tooth-edge floating valve of a chemical tower tray. The automatic installing machine for the tooth-edge floating valve of the chemical tower tray comprises a sliding base, a vibration feeding conveying assembly, a vacuum adsorption pressing assembly and an electric push-bending assembly; the whole sliding base is in an inner concave shape with two high ends and a low middle, and is slidably connected with a Y-axis carriage and an X-axis carriage; the vibration feeding conveying assembly comprises a vibration feeding machine and a conveying device; and the vacuum adsorption pressing assembly comprises a pressing portal frame, a front table slide block, a front table polish rod, a front table polish rod support and a sucker pressing mechanism. According to the automatic installing machine for the tooth-edge floating valve of the chemical tower tray, automatic installation of the tooth-edge floating valve on the chemical towertray can be realized through the vibration feeding conveying assembly, the vacuum adsorption pressing assembly and the electric push-bending assembly, manual installation of workers can be replaced, and installation efficiency is improved. Moreover, the quality problem caused by operation errors of mounting workers is avoided, and the mounting quality of the tooth-edge floating valve can be unified.