The invention discloses a double-transformer serial and parallel structure full-bridge LLC (logical link control) resonant converter, and belongs to the technical field of DC/DC converters. The double-transformer serial and parallel structure full-bridge LLC resonant converter comprises a main circuit and a control module, wherein the main circuit comprises an input direct-current source, a full-bridge switching network, an LLC resonant network, a secondary rectifier filter circuit and a battery pack load which are sequentially connected, and the control module comprises an output voltage sampling circuit, an output current sampling circuit, a feedback adjusting circuit, a control chip and a driving circuit. The full-bridge LLC resonant converter is provided with a double-transformer serial and parallel structure, primary windings of two transformers are serially connected, current flowing through the primary windings is the same, secondary current can be automatically balanced, turns of the primary windings are decreased, current stress of secondary windings and rectifier diodes can be reduced by secondary parallel connection, the size of a magnetic core can be decreased by the double-transformer serial and parallel structure, hot spots can be dispersed, heat management is facilitated, and the full-bridge LLC resonant converter is applicable to places with medium-high power electric vehicle chargers.