To alleviate the increasingly severe global warming problem and achieve carbon neutrality goals, the carbon capture, utilization, and storage (CCUS) technology has attracted widespread attention as an important breakthrough direction. High-performance adsorption separation technology is the key to the implementation of CCUS technology. For the currently largest and most difficult-to-handle low-concentration CO_2 emission, such as direct capture of CO_2 from air, considering factors such as capture energy consumption and cost, pressure swing adsorption has obvious advantages over chemical absorption, membrane separation, or other technologies. The selection of suitable adsorption materials is crucial. This article reviews several main types of CO_2 solid porous adsorbents at present stage, including carbon materials, metal-organic frameworks (MOFs), molecular sieves, amine-modified solid porous materials, and polyionic liquids, expounds their related research progress and existing problems in CO_2 capture process, and briefly introduces the subsequent industrial applications. The issues for current low concentration CO_2 capture technologies to be addressed are associated with the adsorbent regeneration and diffusion problems and the prospects for the conversion and reuse process of captured CO_2.