The invention discloses a change-over switch used for multiple transmitters and multiple antennas. The change-over switch comprises a box body, a rotating disc capable of rotating relative to the box body is arranged in the box body, the rotating disc is provided with a plurality of groups of contact groups arranged in a circumferential manner, a plurality of metal contact sheets arranged along the radial direction of the rotating disc are arranged in the contact groups, the metal contact sheets are electrically connected in pairs in a non-repeating manner, a fixing pallet arranged parallel to the rotating disc is also arranged in the box body, the fixing pallet is provided with a plurality of contacts arranged in a linear manner, the contacts are respectively connected with an external connector, and the external connectors are arranged outside the box body. According to the change-over switch, through switching of connecting lines between the transmitters and the antennas, when the transmitter or the antenna has faults, the switch to a standby machine, or the switch to the antennas with different frequencies, or the switch to the transmitters with different powers is realized to change the work state. According to the change-over switch, the structure is simple, the operation is convenient, the switching is flexible and changeable, a lot of manpower and material resources are reduced, the machine-changing time is saved, and the work efficiency is greatly improved.