One kind of composite solid beverage was studied using pomegranate powder, sweetener, and citric acid as materials. The formulation was optimized by the fuzzy mathematics method of sensory evaluation combined with the orthogonal experiment. The results showed that effects of different factors were pomegranate powder adding amounts > sweeteners > seabuckthorn powder adding amounts > citric acid. The sensory evaluation score was 4 and the optimal combination of test score was 3.56 based on the poor analysis and sensory evaluation, which demonstrated that sensory quality of product could be rated as excellent. The optimized formula was pomegranate powder 60%, seabuckthorn powder 2%, sweetener 25%, citric acid 3%, and accessories 10%. The product has good color, flavor, and texture, which will have a broad development prospect.