A network access method for hybrid networking, comprising: Calculating, by a proxy coordination device, a value of a wireless quality parameter of the proxy coordination device based on a value of a link quality parameter of the proxy coordination device in a power line communication PLC network, wherein the link quality parameter of the proxy coordination device comprises any one or more of the following: a communication rate of the proxy coordination device, channel quality of the proxy coordination device, and a level of the proxy coordination device, and the wireless quality parameter of the proxy coordination device comprises any one or more of the following: an expected transmission count ETX of the proxy coordination device, a link quality level LQL of the proxy coordination device, and a hop count of the proxy coordination device; calculating, by the proxy coordination device, link overheads of the proxy coordination device based on the value of the wireless quality parameter of the proxy coordination device, wherein the link overheads of the proxy coordination device are used to indicate overheads for performing network access by a station device through the proxy coordination device based on radio frequency RF communication; and sending, by the proxy coordination device, a destination oriented directed acyclic graph information object DIO packet, wherein the DIO packet comprises the link overheads of the proxy coordination device; wherein the sending, by the proxy coordination device, a DIO packet comprises: sending, by the proxy coordination device, the DIO packet after determining that a value of a restriction parameter of the proxy coordination device satisfies a threshold requirement, wherein the restriction parameter comprises any one or more of the following: an expected transmission count ETX, a link quality level LQL, and a hop count, wherein the DIO packet further comprises first information, and the first information is used to indicate the restriction parameter. Calculating, by a proxy coordination device, a value of a wireless quality parameter of the proxy coordination device based on a value of a link quality parameter of the proxy coordination device in a power line communication PLC network, wherein the link quality parameter of the proxy coordination device comprises any one or more of the following: a communication rate of the proxy coordination device, channel quality of the proxy coordination device, and a level of the proxy coordination device, and the wireless quality parameter of the proxy coordination device comprises any one or more of the following: an expected transmission count ETX of the proxy coordination device, a link quality level LQL of the proxy coordination device, and a hop count of the proxy coordination device; calculating, by the proxy coordination device, link overheads of the proxy coordination device based on the value of the wireless quality parameter of the proxy coordination device, wherein the link overheads of the proxy coordination device are used to indicate overheads for performing network access by a station device through the proxy coordination device based on radio frequency RF communication; and sending, by the proxy coordination device, a destination oriented directed acyclic graph information object DIO packet, wherein the DIO packet comprises the link overheads of the proxy coordination device; wherein the sending, by the proxy coordination device, a DIO packet comprises: sending, by the proxy coordination device, the DIO packet after determining that a value of a restriction parameter of the proxy coordination device satisfies a threshold requirement, wherein the restriction parameter comprises any one or more of the following: an expected transmission count ETX, a link quality level LQL, and a hop count, wherein the DIO packet further comprises first information, and the first information is used to indicate the restriction parameter.