Electroencephalogram signal acquisition equipment and method oriented to complex electromagnetic interference environment

The invention discloses a complex electromagnetic interference environment-oriented electroencephalogram signal acquisition device and method, and relates to the technical field of bio-electricity signal processing, and the device comprises an acquisition module and a main controller; each acquisition node is provided with an acquisition module; the acquisition module is used for acquiring an electroencephalogram analog signal at the corresponding acquisition node and directly converting the electroencephalogram analog signal into an electroencephalogram digital signal at each acquisition node; the main controller and the acquisition module are connected to the same bus for bidirectional communication through a shared bidirectional communication and power supply composite line; and the main controller is used for sending a control command to the acquisition modules at the acquisition nodes through the composite line, and acquiring electroencephalogram digital signals fed back by the acquisition modules and th