The invention relates to a networking method for achieving medium-voltage communication by using an arrester. A first communication module and a second communication module are respectively configured at two ends of a 10kV line; the first communication module is connected with the 10kV line via a first injection module; the second communication module is connected with the 10kV line via a second injection module; and at least one injection unit in the first injection module and the second injection module comprises an arrester unit. According to the networking method for achieving medium-voltage communication by using the arrester provided by the invention, a new 10kV line communication link is provided, and the establishment of the medium-voltage communication link is enriched.