Preparation method of roxburgh rose red sour soup

The invention discloses a preparation method of roxburgh rose red sour soup. The preparation method comprises the following steps of: (1) crushing fresh Guizhou local red peppers, and adding a first mixed strain for fermentation; (2) crushing fresh Guizhou local small tomatoes, and adding a second mixed strain for fermentation; (3) adding water into roxburgh rose fruit residues, uniformly mixing, boiling for sterilization, adding a third mixed strain for fermentation; and (4) mixing fermented chili sauce and tomato pulp fermented roxburgh rose fruit residues, performing fine grinding, and performing secondary fermentation to obtain the roxburgh rose red sour soup. By adopting a process of separate fermentation and secondary mixed fermentation of the tomatoes, the peppers and the roxburgh rose fruit residues, the red sour soup with stable product quality, high lactic acid content, rich organic acid types and strong flavor is obtained. The roxburgh rose fruit residues contain rich nutrient substances such as fl