The invention relates to the technical field of information, and in particular relates to a distance-enhanced Ethernet transmission method applied to a bidirectional transmission process that is performed via a single channel between a first physical layer of a first communication terminal and a second physical layer of a second communication terminal; and the single channel adopts a transmissionmedium to connect the first physical layer with the second physical layer. The Ethernet transmission method comprises the steps of: judging whether the transmission distance of the transmission mediumis less than a preset threshold; if yes, setting transmission rate between the first physical layer and the second physical layer to be a preset transmission rate within 90-110 Mbit/s; and if no, setting the transmission rate between the first physical layer and the second physical layer to be 1/10 of the preset transmission rate, within 9-11 Mbit/s. According to the technical scheme, signal transmission between the first communication terminal and the second communication terminal achieves both high efficiency under short distance and good stability under long distance, so that the problem of limitation on transmission distance of the Ethernet is improved to a certain degree, and the cost is relatively low.