A main and auxiliary output linkage control function socket comprises an input plug, a main output socket, an auxiliary output socket, a rectification transformation circuit, a single-chip microcomputer control circuit and a relay. The input plug is electrically connected to the main output socket, the rectification transformation circuit and the relay respectively. The main output socket and the rectification transformation circuit are electrically connected to the single-chip microcomputer control circuit respectively. The single-chip microcomputer control circuit is electrically connected to the relay. The relay is electrically connected to the auxiliary output socket. Compared to an existing apparatus, by using the socket of the invention, the single-chip microcomputer control circuit detects an output current of the main output socket, determines a work state and makes the current connect to the relay of the auxiliary output socket so as to provide power for the auxiliary output socket, therefore, a power supply mode in which the main output socket links and controls the auxiliary output socket is realized; actual energy consumption of a terminal electric appliance is effectively reduced, energy wastes and losses are decreased, environment pollution is reduced, user life quality is improved and market competitiveness of a product is increased.