Abstract: This paper evaluated the adsorption effect of pinecone on formaldehyde based on its adsorption capacity. The physicochemical properties of pinecone were systematically studied by Field Emission Scanning Electron Microscope(FE-SEM), Fourier Transform Infrared Spectroscopy(FTIR) and substance analysis. The experimental results showed that the relationship of formaldehyde adsorption capacity of three common pinecones was that Pinus tabulaeformis < Pinus elliottii < Pinus massoniana. Compared with activated carbon, molecular sieve and bamboo charcoal, the adsorption capacity of Slash pinecone was equivalent to these three traditional adsorbents, and had ideal adsorption effect. At the same time, the physicochemical experiment revealed that formaldehyde adsorption of pinecone was closely related with its physical and chemical absorption. The surface micro structure, oxygen-containing active groups, material composition and special volatile gas could all improve formaldehyde intake. Therefore, the use of pinecone to purify indoor formaldehyde and realize waste recycling has certain feasibility and research significance.