Three-stage gas pretreatment device

The utility model discloses a three-stage gas pretreatment device, and particularly relates to the field of gas treatment, which comprises a treatment box body, a refrigeration sheet is arranged at the upper end of an inner cavity of the treatment box body, a guide plate is arranged at the lower end of the inner cavity of the treatment box body, a direction through hole is formed in the lower end of the treatment box body, and a concave sliding piece is arranged at the lower end of the direction through hole. And a strip-shaped sliding block is arranged in the direction through hole. In the actual use process, gas can be conveniently pretreated through the arranged refrigeration piece and the arranged flow guide plate, the fixed sliding block can be conveniently mounted and dismounted through the arranged direction through hole and the arranged strip-shaped sliding groove, water absorption materials placed in the storage fixing groove can be conveniently replaced, and the water absorption effect is improved.