The utility model discloses a lifting device of a gas detector, and relates to the field of lifting devices. The gas detector hoisting device comprises a storage box, a rotating shaft, a rocker, a hoisting rope and a detector accommodating part. A containing cavity is formed in the storage box, and an opening communicated with the containing cavity is formed in the side wall of the storage box. The rotating shaft is located in the containing cavity and is rotationally arranged on the wall face of the storage box to be connected. The rocker is located on the side of the storage box and connected with the rotating shaft. One end of the lifting rope is connected with the rotating shaft, and the other end of the lifting rope extends out of the opening. The detector containing part is connectedwith the end, away from the rotating shaft, of the hoisting rope, and a containing groove is formed in the end face of the detector containing part and used for containing a gas detector. The liftingdevice for the gas detector can effectively lift the gas detector to the underground for gas detection.