The invention discloses an adsorption tower. The adsorption tower comprises a ventilation head, a spherical cap-shaped pore plate, a filtration blocking layer, a central press ring, a side press ring and an air inlet pipe. The ventilation head is connected to the air inlet pipe of the adsorption tower. The filtration blocking layer is fixed on the spherical cap-shaped pore plate by the side press ring and the central press ring. The adsorption tower can realize uniform distribution of an air-flow in the adsorption tower, can reduce air-flow impact, can realize full utilization of a filling material in the adsorption tower, and has greatly reduced whole height and low adsorption tower installation place requirements.