The invention relates to an automatic capping device and an automatic decapping device used for two ends of copper tubes and used in cooperation.The automatic capping device and the automatic decapping device are involved, and the matched devices for automatically capping and decapping the two ends of the copper tubes before and after heat treatment respectively are provided for the copper tubes used in the communication industry; the automatic capping device is used for arraying the scattered copper tubes and caps according to the set position before heat treatment and automatically capping the two ends of the copper tubes, the decapping device is used for taking down the caps covering the two ends of the copper tubes with the caps from the copper tubes.The automatic capping device and the automatic decapping device are scientific and reasonable in structure, easy to control, reliable and stable in use performance, high in automation degree during cooperative use, high in work efficiency and capable of capping and decapping the two ends of multiple copper tubes and saves manpower resources.