Steam explosion method for improving tobacco stem quality

The invention discloses a steam explosion method for improving the quality of tobacco stems. The method comprises the following steps: loading raw material tobacco stems into a sample introduction cylinder of a steam explosion test bed, then introducing saturated steam into the sample introduction cylinder until the pressure reaches 0.5-1.5 MPa, and keeping the pressure for 30-90 seconds, so that the raw material is fully infiltrated; spraying the obtained material into a material storage tank; dividing the obtained material into two parts, drying and crushing one part of the material, and determining conventional chemical components, total cell wall substances and aroma components after crushing; the other part of the material is dried and dampened to balance the moisture to 10-12% for measuring the expansion value of the tobacco stems; through component determination and expansion degree determination, the main chemical quality, neutral aroma substances and expansion degree of the tobacco stems are evaluate