Subway platform door display screen rail equipotential connecting device

The utility model discloses a subway platform door display screen track equipotential connecting device, which relates to the subway field, and comprises a switch control module used for controlling a signal overturning module to start working after receiving a traction power supply signal; the signal input module is used for inputting a shielding door control signal or a shielding door closing signal; compared with the prior art, the utility model has the beneficial effects that the traction power supply signal is arranged to control the introduction of the shielding door signal, the condition that the shielding door is opened when the subway is not stopped is prevented, the interlocking circuit is arranged for the shielding door closing signal and the shielding door control signal, and only one signal is input at the same time; an input signal passes through the signal overturning module and then controls connection or bounce-off of the track ground and the platform ground, it is guaranteed that the track g