Underground phase change temperature adjustment method and device

The invention discloses an underground phase change temperature adjustment method and device, and relates to the technical field of underground operation. The underground phase change temperature adjustment device comprises a refrigeration end, a heat dissipation end, a circulation mechanism and a control phase change generation mechanism; the refrigeration end, the heat dissipation end and the control phase change generation mechanism all communicate with the circulation mechanism; a phase change medium is accommodated in the circulation mechanism; the control phase change generation mechanism is used for controlling the phase change medium to generate heat absorption phase change at the refrigeration end; and the control phase change generation mechanism is further used for controlling the phase change medium subjected to heat absorption phase change to generate heat dissipation phase change at the heat dissipation end. Heat can be absorbed through heat absorption phase change to achieve cooling, heat can b