Embodiments of this application provide a link resource transmission method and apparatus. The method includes the following steps. A first node floods first control routing information, where the first control routing information includes an identifier of an area in which the first node is located. A second node floods second control routing information, where the second control routing information includes an identifier of an area in which the second node is located. The first node determines, through comparison, whether the identifier of the area in which the first node is located is consistent with the identifier of the area in which the second node is located. When the identifier of the area in which the first node is located is consistent with the identifier of the area in which the second node is located, the first node transmits link data information of the first node to the second node.