The invention relates to a wire clamping device for a carbon fiber wire, which comprises a connection assembly and a wire clamping assembly which are coaxial with the carbon fiber wire and are sequentially arranged between angle divergence assemblies. Each angle divergence assembly comprises a plurality of snake joints; each snake joint is of a hollow fillet convex structure; the adjacent snake joints are in clamping and matching connection; the angle divergence assemblies are in flexible matching connection with the connection assembly by the snake joints; and the connection assembly and thewire clamping assembly are in rigid connection for carrying out clamping and fastening on the carbon fiber wire and preventing sliding of the carbon fiber wire. According to the wire clamping device provided by the invention, when the carbon fiber wire is lifted off, the angle divergence assemblies avoid serious bending of the carbon fiber wire so as to avoid damage to a carbon fiber core rod.