Gas absorption cell

The utility model belongs to the technical field of gas detection, and particularly relates to a gas absorption cell which comprises a shell, a non-metal hard mounting plate, a first reflecting mirror, a second reflecting mirror and a third reflecting mirror, a flexible layer is adhered to one side of the non-metal hard mounting plate, and one surface, deviating from the non-metal hard mounting plate, of the flexible layer is adhered to the shell; the first reflector, the second reflector and the third reflector are fixedly connected to one face of the non-metal hard installation plate, the three reflectors are fixed to the non-metal hard installation plate, the flexible layer is connected between the non-metal hard installation plate and the air chamber shell in a glued mode, and the non-metal hard installation plate is good in thermal stability, high in hardness and not prone to being affected by the environment temperature to deform, so that the air chamber shell is not prone to deformation. And the non-me