Straw briquette machine with flat modules and pressure between roller and die hole friction interaction, material molding. Material processing without adding any additives or binders. Contains a certain amount of material such as straw cellulose and lignin, structure is an item of its lignin monomers, polymers of propylene is benzene. With enhanced cell wall, cellulose adhesive role. Lignin is a non-crystalline, main part does not dissolve in any solvent at room temperature without melting, softening point. When the temperature reaches a certain value, lignin softening increases bond strength, and under a certain pressure, making the cellulose molecules dislocation, deformation, extension, internal adjacent biomass particles bridle joint, reassemble and pressing.