Control circuit for emergency brake loop

The invention discloses a control circuit for an emergency brake loop, relating to the technical field of train control. The control circuit comprises at least one normally opening relay and two normally closed relays, which are connected in series in an emergency brake loop, wherein the at least one normally opening relay is simultaneously controlled by two host machines, and the two normally closed relays are respectively controlled by the two host machines. According to the control circuit for the emergency brake loop, the normally opening relay controlled simultaneously by the two host machines is arranged in series in the emergency brake loop, so that the two host machines output same signals, and the system can normally operate without using a switch device after one of the two host machines cannot work.