PROBLEM TO BE SOLVED: To provide a method for producing plant cell wall substance powder having a function of adsorbing a large amount of moisture and having a function of absorbing the moisture from an object and drying the same by effectively utilizing plant cell wall substance powder.SOLUTION: A palm material, a bamboo and a timber formed by cutting coniferous tree plant cell wall substance powder, broad leaf tree plant cell wall substance powder, green leaf tree plant cell wall substance powder, palmae plant cell wall substance powder, miscellaneous plant cell wall substance powder and bamboo plant cell wall substance powder are made into a sawdust shape, the same is subjected to heat drying, lyophilization and heat drying under the natural environment so as to control its moisture from 6 to 18%, is refined into powder so as to contain a plant cell wall, cellulose, hemicellulose and lignin and may be further subjected to screening at about 10 to 200 meshes. The cut formation may be performed by a method where, in a processing factory, a coniferous tree plant, a broad leaf tree plant, a green leaf tree plant, a palmae plant sawdust plant and a bamboo plant are selected, are processed in consideration of the functions of the respective objects, and is subjected to cracking, pulverization, peeling and pressing or may be formed into a square bar or a plate with a lumber machine, and the same is refined into powder with a large-sized sawdust production machine. It is possible that the one frozen at about -70 to 0°C is dried, and it may be hot wind drying and freeze drying by a dry chamber or may be wind drying under the natural drying at an atmospheric temperature of -15 to 35°C.【課題】 植物細胞壁物質粉体を有効利用し、水分を大量に吸着する機能を有し、物体から水分を吸収し乾燥させる機能を有している、植物細胞壁物質粉体製造を提供する。【解決手段】 針葉樹植物細胞壁物質粉体、広葉樹植物細胞壁物質粉体、緑葉樹植物細胞壁物質粉体、ヤシ類植物細胞壁物質粉体、雑木植物細胞壁物質粉体、竹類植物細胞壁物質粉体を切断形成したヤシ材、竹材、木材を、おが屑状にして水分６％から１８％に熱乾燥、及び凍結乾燥、自然環境下で熱乾燥し、粉体に精製し植物細胞壁、セルロース、ヘミセルロース、リグニンが含有し、さらに、篩分けして、１０から２００メッシュ程度行っても良い。 切断形成は、処
