Asparagus protein powder

The invention discloses an asparagus protein powder, which is prepared by protein powder which serves as main raw materials and instant asparagus powder and then packaged. The preparation of the asparagus protein powder comprises the steps of extracting asparagus juice; concentrating the juice; spray drying; mixing with the protein powder; and obtaining the asparagus protein powder. According to the medical test results, a user can improve sleeping quality and immunity by taking more than 160mg of the asparagus protein powder containing asparagus saponin everyday. The asparagus protein powder develops new ways for application of the instant asparagus powder, is beneficial to expanding the market scope of asparagus materials, and fills up the market vacancy of the asparagus protein powder.