Ground wire monitoring device

The invention discloses a ground wire monitoring device comprising a box body. A ground wire inlet and a ground wire outlet are formed in the top and the bottom of the box body. A transparent tube isarranged in the box body and penetrates a grounding resistance on-line tester and a lightning current sensor successively; the two ends of the transparent tube are communicated with the ground wire inlet and the ground wire outlet; and the lightning current sensor is electrically connected with an SPD intelligent monitoring terminal. A wireless data radio station is arranged in the box body; and the grounding resistance on-line tester and the lightning current sensor are in communication connection with the wireless data radio station. Besides, a solar panel is installed outside the box body;a storage battery and a solar panel controller are arranged in the box body; and a back connection end of the solar panel and the storage battery are connected with the solar panel controller electrically. The ground wire moni