Electronic switching circuit and track circuit

The invention discloses an electronic switch circuit and a track circuit. The electronic switch circuit comprises a first interface, a second interface, a switch module, a protection module and a relay control interface; the first interface is connected with the positive power receiving end of the first steel rail; the second interface is connected with the negative power receiving end of the second steel rail; the switch module is respectively connected with the first interface, the second interface and the relay control interface, and the switch module is used for controlling connection and disconnection between the second interface and the relay control interface according to a relative relation between a voltage value of the first interface and a first preset range; the protection module is connected with the first interface and the switch module and used for controlling the switch module and the relay control interface to be disconnected if the switch module has a short-circuit fault under the condition