The invention relates to a two-way transmission converter applicable to high voltage and high power. The two-way transmission converter applicable to high voltage and high power comprises a power module; the power module comprises a high-frequency transformer and full-bridge topological structure modules, wherein the full-bridge topological structure modules are connected with every phase of the original side and the secondary side of the high-frequency transformer and composed of four modules SMp and four modules SMs; every bridge arm of the full-bridge topological structure module connected with every phase of the original side is provided with one module SMp, and every bridge arm of the full-bridge topological structure modules connected with every phase of the secondary side is provided with one module SMs. The two-way transmission converter applicable to high voltage and high power reduces the switching frequency and the switching loss of a power tube as well as the electrical stress born by a single tube and improves the waveform quality of an alternate current link.