Signal acquisition device of brain-computer interface

A brain-computer interface signal acquisition device disclosed by the present invention comprises a clamping plate, a base plate, a head cover cloth and a brain electrode, the upper side of the brain electrode is fixedly connected with a signal transmission wire, a first sliding rod and a second sliding rod are sequentially inserted in the clamping plate from front to back, and a stand column is arranged on the back of the clamping plate. An upper transverse rod and a lower transverse rod are sequentially and fixedly installed on the inner side of the stand column from top to bottom, an electric signal receiver is fixedly installed on the upper side of the upper transverse rod, a servo motor is fixedly installed on the outer side of the stand column, and a two-way screw rod is fixedly installed at the output end of the servo motor. Signal transmission wires can be limited by an electrified signal receiver, so that the signal transmission wires are arranged in order, daily use is facilitated, hood cloth, a ser