disclosed is a method for preparing a semi - furanic copolyamide containing at least one furanic dicarboxylic acid moiety and at least one aliphatic diamine moiety in the backbone . the method is based on solid - state polymerization . particularly , the method uses a biomass - derived furanic dicarboxylic acid as a raw material . a semi - furanic copolyamide prepared by the method has molecular weight and color levels that are practically required in industrial applications . in addition , the semi - furanic copolyamide can replace fossil fuels due to its good thermal stability and is suitable for use as an environmentally friendly bioplastic .