The invention discloses a geographic position information-based mobile sink routing method, which comprises steps of determining a proper anchor node and establishing a data transmission path. A mobile sink routing protocol of the invention can effectively support the mobile sink and effectively balance the energy consumption of the network; the anchor node through which the mobile sink can determine the position of a source node can be added in the entire network; and the source node can transmit the data to the anchor node by using the geographic information-based routing protocol and then transmit the data from the anchor node to the sink node.