The invention relates to the field of the conductor connection, in particular to a connector used for conductor connection, a connection device and a cold link technology for conductor connection. The connector used for the conductor connection, the connection device and the cold link technology for conductor connection are widely applied to the processes, such as electric power, electric power construction and installation, and electric wire and cable manufacture, are used for the isometric connection or reducing connection for cable conductors and bare copper and aluminum stranded wires, and are also used for solving the problems of untight contact between the conductor and a connecting pipe, low tensile strength, big contact resistance, unsmooth surface, uneven electric field distribution and the like. The connection device is provided with a taper-shaped connector, a cold link die, a conductor I and a conductor II, wherein the center of the cold link die is in a pore structure cooperated with the taper-shaped connector; the taper-shaped connector is arranged in the pore structure; and the conductor I and the conductor II respectively extend into the connection pore of the taper-shaped connector for butt joint from two ends of the pore structure of the cold link die. After the cold link technology disclosed by the invention is adopted, the technology is advanced, the performance is excellent, and the product quality is stable. After the conductors are connected by the cold link technology, the connector and the conductors tightly contact to almost form a whole without any gap.