The invention discloses a
microwave heating triaxial test device and a sample heating method. The device comprises a novel triaxial pressure chamber, a
microwave heating device, a temperature controller and a
microwave modem, wherein a columnar heating cylinder is attached to the inner wall of a pressure chamber cylinder, the space between the pressure chamber cylinder and the columnar heating cylinder is filled with glass fibers, and the pressure chamber cylinder, the glass fibers and the columnar heating cylinder form a lifting integrated structure, so that disassembling is not needed, and operation is easy; and the microwave heating device is embedded into a sample cap on the upper portion of the pressure chamber, the microwave device is connected with a microwave
signal processor through a wire, the microwave
signal processor is connected with the microwave modem through a wire, the microwave modem is connected with a temperature sensor through a wire, and the temperature sensor isconnected to the interior of the pressure chamber and the upper portion of a sample through wires, so that a
closed loop is formed. Through the device and the method, direct overall heating of the sample itself can be realized,
internal temperature and external temperature of the sample are consistent, the influence of non-uniform heating on a test result is avoided, and the accuracy of the triaxial test result is ensured.