The utility model provides a contact net charged real-time detection device. A real-time online electricity verification service is provided for rail transit operation and maintenance personnel to prevent electrical misoperation accidents. The contact net charged real-time detection device comprises a base, a detection host and a battery. The base is fixedly arranged on an electrical device, and is electrically connected with a high voltage direct current positive electrode and a high voltage direct current negative electrode. The detection host comprises a charged state detection module, a power supply module, a device address module and a wireless communication module, wherein the charged state detection module, the power supply module, the device address module and the wireless communication module are electrically connected with a microprocessor. The battery powers the detection host. The charged state detection module is electrically connected with the high voltage direct current positive electrode and the high voltage direct current negative electrode of a contact net. Data acquired by the microprocessor are sent by the wireless communication module.