Abstract: Preparation process of Eucheum SDF solid beverage were studied by orthogonal optimizing experiment of main material and excipient based on the sensory evaluation, and physic-chemical index of the Eucheum DF solid beverage was determined. The results showed that the best formula of Eucheum DF solid beverage was Eucheum SDF 55%, xylitol 10%, citric acid 0.5%, V C 0.2%, calcium lactate 0.1%, ferrous gluconate 0.1%, CMC-Na 0.1%, maltodextrin 34%.According to the optimal ratio, the average sensory scores was 4.6, the physic-chemical and microorganism index accorded with the hygienic standard for solid drink GB 7101.The preparation process of Eucheum DF solid beverage was simply, maneuverability was strong, all indexes were well. Therefore, this study could provide technique evidence for the production and application of Eucheum dietary fibre functional food.