Special gas chromatograph for chemical reagent

The utility model relates to the technical field of chemical reagents, and provides a special gas chromatograph for a chemical reagent, which comprises a gas box chromatograph body, a row of sample inlets are arranged at the top of the gas box chromatograph body along the width direction, two guide rods which are symmetrical front and back are fixedly arranged above the gas box chromatograph body along the length direction, and the two guide rods are fixedly arranged on the gas box chromatograph body along the length direction. The two guide rods are jointly sleeved with an adjusting plate in the horizontal direction in a sliding mode. According to the utility model, the adjusting plate can be pushed to move left and right along the guide rod, then the supporting plate is pressed by a hand so that the needle head of the sample injection needle can be moved into the corresponding sample injection port, and then the long rod is held by the other hand and pressed downwards, so that the strip-shaped pressing plat