The invention discloses a mining survival time calculator which comprises a motherboard, a display screen, control display modules and a power supply. The mother board comprises a circuit board, an arithmetic device, a controller and a memorizer, the arithmetic device, the controller and the memorizer are integrally mounted on the circuit board, the display screen is electrically connected with the corresponding control display module, the control display modules are electrically connected with the motherboard, the motherboard is electrically connected with a keyboard, and the motherboard and the display screen are respectively and electrically connected with the power supply. Survival time of a person sealed in a closed space can be rapidly calculated when a mine disaster happens, so that emergency rescue and disaster relief are reasonably arranged, the safety coefficient of mining personnel is improved, and loss caused by the mine disaster is reduced.