DTU signal supplement relay device for underground power distribution room

The invention provides an underground power distribution room DTU signal supplement relay device which comprises a data forwarding module and an encryption module, the data forwarding module is connected with a DTU to obtain data needing to be transmitted, and the encryption module encrypts the data needing to be transmitted and then transmits the data needing to be transmitted to a master station. The encryption module needs to be arranged at an earth surface outlet of the underground power distribution room. By arranging the data forwarding module and the encryption module, the relay forwarding function of the DTU data is achieved, the encryption module is arranged at the ground surface outlet of the underground power distribution room, wireless transmission signals which are wide in coverage and stable in quality on the ground surface can be fully utilized, and therefore the underground power distribution DTU data are forwarded to the main station. According to the device, the problems that rewiring is nee