The invention discloses a length-adjustable communicating steel pipe for electroplating. The length-adjustable communicating steel pipe comprises connecting pipes, two ends of one connecting pipe is provided with a joint, the connecting pipes are connected with docking pipes, connecting holes are arranged in the positions of the joints between the connecting pipes and the docking pipes, a telescopic pipe is externally connected with each docking pipe, the telescopic pipes are connected with the docking pipes through adjusting barrels, and the inner wall of each of the connecting pipes, the docking pipes and the telescopic pipes is evenly provided with a ceramic layer. The length-adjustable communicating steel pipe can serve as delivering pipeline of electroplating molten liquid, so that the electroplating molten liquid can be conveniently delivered to an electroplating pool conveniently, and wear resistance and high-temperature resistance of the communicating steel pipe are greatly improved by the aid of the ceramic layer arranged on the inner wall of each of the connecting pipes, the docking pipes and the telescopic pipes.