Abstract: The present disclosure provides a voice prompt system, a voice prompt method for a bridge girder erection unit, a computing device, and a medium. The voice prompt system includes a control circuit and an alarm circuit; the control circuit includes a control power supply, a programmable controller, and relays; the positive electrode of the control power supply is electrically connected with an input end of the programmable controller, an output end of the programmable controller is electrically connected with input ends of the at least two relays, respectively, and output ends of the relays are connected to the negative electrode of the control power supply after being connected in parallel; the alarm circuit includes relay contacts, a wiring terminal block, and an alarm; the wiring terminal block includes at least two high-potential pins and a low-potential pin.