The invention provides a method for extracting dihydromyricetin and polysaccharide in vine tea at a relatively low temperature of 40-60 DEG C. The method for extracting dihydromyricetin and polysaccharide in vine tea is realized through the following technological means and technological processes: drying stems and leaves of vine tea, grinding, sieving, carrying out treatment for a certain time at a certain temperature and a certain ultrasonic power while water is taken as a solvent, carrying out natural cooling, then standing for 12-24 hours to crystallize and precipitate dihydromyricetin, centrifuging a feed liquid mixture, concentrating the obtained supernate, carrying out ethanol precipitation, washing and drying, so as to obtain crude polysaccharide of the vine tea; adding boiling water into residue after centrifugation, stirring, and insulating for about 10 minutes so as to ensure that crystallized dihydromyricetin is redissolved, then centrifuging immediately, and after the supernate is cooled, carrying out standing for 12-24 hours at 4 DEG C so as to ensure that dihydromyricetin is crystallized; centrifuging, and drying precipitate, so that dihydromyricetin crude extract is obtained. By adopting the method for extracting dihydromyricetin and polysaccharide in vine tea, the solubilizing effect of ultrasonic wave and the cell disruption effect are utilized for realizing rapid, efficient and synchronous extraction of two active substances in the vine tea at a low temperature, the yield of the dihydromyricetin and polysaccharide products is high, properties of the crude extract are good, and subsequent purification steps are effectively reduced, so that the energy consumption and the cost are reduced.