The invention relates to a semi-implantable brain-computer interface for animals, which comprises a fixed base, a hollow tube and a protective shell, and is characterized in that the fixed base is used for being fixedly mounted on a
skull of an animal to be implanted; the hollow tube is used for penetrating through muscles between the
scalp and the
skull of an animal to be implanted, one end of the hollow tube is connected with the fixed base, the other end of the hollow tube is connected with the protective shell, an
electrode channel is formed in the hollow tube, a flexible
electrode wire is arranged in the
electrode channel, and the flexible electrode wire is used for stretching out of the electrode channel to be implanted into the brain area of the animal to be implanted; the protective shell is used for being exposed out of the
scalp of an animal to be implanted, a containing cavity is formed in the protective shell and communicates with the electrode channel, a
signal processing module is installed in the containing cavity, and the end, close to the protective shell, of the flexible electrode wire is connected with the
signal processing module. Implantation design is optimized, a goblet-like structure is adopted, it is guaranteed that the brain-computer interface is implanted and installed stably,
craniotomy wounds are reduced, and
serious infection caused by the too large wounds is avoided.