Disclosed by the present invention is a transmission device for an antenna phase shifter, comprising a transmission input portion, a shift selection portion, and a transmission output portion; the transmission input portion is fully separated from the shift selection portion, by means of the shift selection portion, the transmission input portion establishes transmission connection with any output terminal of the transmission output portion, thereby performing phase adjustment on a phase shifter that is connected to the output terminal. In the present invention, two motors are responsible for power input and selection output respectively so as to select to drive any number of phase shifters; furthermore, the structure is compact, and output terminals of the transmission output portions may be spread out flat, being beneficial for antenna layout.