The utility model discloses a mine gas detector, the power distribution box comprises a box body, the preceding terminal surface upper left corner of box is equipped with the display screen, and the upper right corner is equipped with the motor operation and presses the button, the left end face central authorities of box are equipped with the probe hold up tank, the inside lower surface of box from left to right is equipped with accumulate pond, bluetooth receiver, motor frame in proper order, the upper end of motor frame is equipped with the motor, the inside of motor is equipped with the pivot, the traction rope connection probe is passed through in the pivot. This mine gas detector realizes transferring and retrieving of probe through the motor, can measure the temperature below the dark mine, humidity, oxygen, gas content, has saved the labour on the one hand, and on the other hand improves dark mine work's security to the upper and lower body of probe is the cone, prevent to transfer or recovery process in obstructing of other barriers receive, conveniently transfer and retrieve, and easy operation, detect rapidly, fine practical value has.