Ethernet equipment processing method and Ethernet system

The embodiment of the invention provides an Ethernet device processing method and an Ethernet system, the Ethernet device processing method is applied to the Ethernet system, the Ethernet system comprises a first device and a second device, and the first device and the second device perform data communication through an Ethernet technology. A first device comprises a first medium access control chip and a first physical layer chip, the first physical layer chip comprises a first physical coding sub-layer PCS and a first physical medium access sub-layer PMA, and the Ethernet device processing method comprises the following steps: the first PMA receives a control signal sent by the first PCS, generates a maintenance code stream and sends the maintenance code stream to a second device, the maintaining code stream is used for maintaining synchronization of link parameters between the first device and the second device, when no data transmission exists between the first device and the second device, the maintainin