A combined power socket for artificial Christmas trees having a pair of sockets set in a ring structure capable of being sleeved on an outer surface of a rod or tube The pair of sockets can be combined as a group, and can be connected with additional power sockets to achieve interconnection, at the same time through the power supply connector leads from each combination type power socket for external devices, such as lamp series power supply, which has the advantages of simpler structure, more convenient connections to external devices.