Abstract:G.lucidum, an edible and medicinal fungus, is rich in bioactive components such as polysaccharides and triterpenoids, exhibiting diverse pharmacological effects including immunomodulation and antioxidant activity. Therefore, developing functional G.lucidum tea beverages based on its health benefits is of great significance. However, existing tea bag products suffer from low release of active substances and poor brewing efficiency. Although traditional boiling extraction enhances the dissolution rate, it is inconvenient for portability, limiting both product quality and convenience. To address these issues, this study optimized the extraction, vacuum concentration, and reconstitution processes of G.lucidum tea using total sugar content as an indicator, and evaluated the flavor quality via electronic tongue, electronic nose, and HS-SPME-GC-MS. The results showed that the optimal extraction conditions were 90℃, a material-to-liquid ratio of 1:200, and 240min. The optimal concentration method was vacuum concentration (temperature 40℃, vacuum degree 30Pa, concentration factor of 20-fold). The optimal reconstitution ratio of the concentrate to the raw material was 1:0.8. The optimal brewing conditions were a tea-to-water ratio of 1:100, brewing time of 4 min, and temperature of 90℃, under which the tea exhibited good sweet and umami tastes while effectively suppressing bitter and sour notes. A total of 21 volatile compounds were identified, primarily esters and aldehydes, with methyl nonanoate being the most abundant, imparting fruity, sweet, and wine-like aromas to the product. Under the same brewing conditions, the novel reconstituted tea showed significantly higher total sugar content than traditionally brewed tea and boiled tea, indicating markedly improved dissolution efficiency of active components. This study effectively addresses the problems of low dissolution rate and poor flavor quality, providing a theoretical basis and technical reference for the deep processing of G.lucidum and the development of high-quality functional tea beverages.