The present invention discloses a high-precision sleeve. The high-precision sleeve comprises a sleeve body, a wire stripping knife, a skin peeling plate, a horn mouth and a location ball. The sleeve body is cylindrical, one end of the sleeve body is provided with the wire stripping knife, the sleeve body is internally provided with the skin peeling plate, one end of the skin peeling plate is arranged at the inner surface of the sleeve body, the other end of the skin peeling plate is arranged at the inner space of the sleeve body, the skin peeling plate is located at the portion of the inner space of the sleeve body and is cylindrical, one end of the sleeve body is provided with the horn mouth, and the inner surface of the horn mount is provided with the location ball. The present inventionfurther discloses a high-precision sleeve technology. The high-precision sleeve technology automatically regulate the position of the wire stripping knife through automatic clamping and regulation ofthe position of the wire body so as to ensure the accuracy of the positions of the wire body and the wire stripping knife and ensure the processing quality because the wire body is not easily damaged.