Gas material recovery device

The utility model discloses a gas material recovery device. The gas material recovery device can prevent gas materials from flowing back when the gas materials in the steel cylinder are recovered. The gas material device comprises a recovery pipeline and a plurality of pressure detection pieces. The recycling pipeline comprises a connecting passage, a plurality of recycling passages and a plurality of control valves, the connecting passage is communicated with a collecting container, the recycling passages are communicated with the connecting passage and used for being connected with the steel cylinders, and the control valves are arranged on the recycling passages and used for controlling the recycling passages to be connected with the steel cylinders. And the controller is used for controlling the conduction state of the steel cylinder and the recovery passage. The pressure detection part is arranged at one end, close to the steel cylinder, of the recovery passage, is used for detecting the air pressure of