The invention provides a joint control acousto-optical pre-warning device for railway construction. The joint control acousto-optical pre-warning device for railway construction comprises train proximity sensors, a wireless data transmission radio, a mainframe, a transmitting antenna and an acousto-optical pre-warning device; the wireless data transmission radio is connected with the sensor; the transmitting antenna is arranged on the mainframe; the train proximity sensors are arranged at the two ends of an ascending line and a descending line in an operation area, respectively; the acousto-optical pre-warning device is arranged inside a large machine. The joint control acousto-optical pre-warning device for railway construction has the advantages that automatic pre-warning is realized by use of radio and electronic techniques, and joint control and joint defense are carried out simultaneously with one machine and a protector so that the construction safety of the large machine can be guaranteed. Due to the operation guidance provided by the joint control acousto-optical pre-warning device on the large machine, not only is the operation efficiency of the large machine improved, but also the safety of large machine operation in a railway train operation related business line is guaranteed.