Testing system and method for realizing three-way multiphase seepage in true triaxial loading process

The invention discloses a test system and method for realizing three-way multiphase seepage in a true triaxial loading process, and relates to the field of test equipment of rock mechanics and seepage mechanics, and the test system comprises a three-way multiphase seepage loading cabin and a fluid injection and measurement system, the three-way multiphase seepage loading cabin comprises a sample metal frame, a loading frame, an outer plate, a fluid injection module, a fluid recovery module and six loading pressure head modules; the sample metal frame is arranged in the center of the loading frame, the outer plate is arranged on the loading frame, the fluid injection module is arranged at the upper part of the loading frame, the fluid recovery module is arranged at the lower part of the loading frame, and the fluid injection and measurement system is connected with the three-way multiphase seepage loading cabin through the fluid injection module and the fluid recovery module; the loading pressure head module i