Efficient energy-saving carbon dioxide drying device

The invention discloses an efficient energy-saving carbon dioxide drying device which comprises a tower body and a drying layer arranged in the tower body, the tower body is communicated with a breather pipe, and an upper regeneration unit directly communicated with the upper portion of the drying layer and a lower regeneration unit directly communicated with the lower portion of the drying layer are further installed in the tower body. The system further comprises a switching unit. According to the technical scheme, according to the efficient energy-saving carbon dioxide drying device, regenerated gas is sprayed out of the upper-layer regeneration unit and conducts drying regeneration on the upper portion of the drying layer, and after the upper-layer regeneration unit conducts regeneration work for a period of time, a channel between the regeneration pipe and the lower-layer regeneration unit is automatically opened through the switching unit; thus, the regeneration gas is ejected from the lower regeneratio