Purple rice vermicelli with high anthocyanin content and preparation method thereof

The invention relates to purple rice vermicelli with high anthocyanin content and a preparation method of the purple rice vermicelli. The preparation method comprises the following steps: selecting purple rice flour and long-shaped rice flour with the particle size of 60-140 meshes, mixing the purple rice flour and the long-shaped rice flour according to the weight ratio of (1-3): (7-9) to obtain compound flour, adding water into the compound flour in a reciprocating manner, adjusting the moisture content to 32-44% to obtain wet pre-processed material powder, and performing curing and extrusion molding by using a twin-screw extruder to obtain the purple rice flour and long-shaped rice flour. And then carrying out aging treatment on the pre-formed purple rice vermicelli under the condition of 2-6 DEG C, and drying after aging to obtain the purple rice vermicelli with high anthocyanin content. According to the scheme provided by the invention, dry powder mixing and humidifying are directly adopted to replace tr