The invention discloses a multi-board communications equipment address query method, the key points of the technical scheme are as follows: comprising at least board modules and querying the address information of another board module or several board modules by an LLDP protocol, which are that: A1. a board module needing to query sends an LLDP message to an MAC address, and repeatedly sends the message at interval: A2. a receiving board module manages a CPU to receive the LLDP message, and upgrades and storage the message in real time; and A3. when needing to query the board module to log in, a user is free from remembering the address of the board module needing to query, the log can be realized by the address stored in the interior of a system. The invention has the purposes that by the invention, the user can obtain the management address of another board through a board CPU, the problem that a network address can not obtained when other boards have no debug serial port can be solved, the difficulty of the multi-bard address management can be reduced, the cooperation capability of the system can be improved, and the use is very convenient.