The utility model provides a mining Ethernet configurable cascade circuit. The mining Ethernet configurable cascade circuit comprises a microprocessor, an Ethernet switch unit, and an Ethernet PHY unit, a switch management unit and an expansion interface circuit which are all in interactive connection with the microprocessor, and the Ethernet PHY unit and the switch management unit are both in interactive connection with the Ethernet switch unit. According to the mining Ethernet configurable cascade circuit, Ethernet interface and Ethernet cascade functions are provided, mining equipment can be accessed to the mining Ethernet conveniently, application range of the mining equipment is expanded, investment of mining Ethernet switches is reduced, and equipment investment and construction cost are largely reduced; VLAN partition can be carried out for the network according to the need, port bandwidth is limited or unnecessary ports are closed, port mirroring is also carried out, and therefore transmission channel bandwidth can be ensured; and various interfaces can be expanded conveniently, and a plurality of types of equipment can be accessed, and equipment fusion of different types of field buses can be achieved.