The invention discloses a method for extracting hesperidin from pericarpium citri reticulatae, which belongs to the technical field of hesperidin extraction. The method comprises the following steps: taking pericarpium citri reticulatae powder, and adding an ethanol solution, so that a mixture is obtained, wherein 40-90 ml of ethanol solution is added into 1 g of pericarpium citri reticulatae powder; and putting the mixture into an airtight container, carrying out extraction for 15-75 min at a temperature of 90-135 DEG C, cooling to room temperature, taking out liquid supernatant, and carrying out centrifugal separation on the liquid supernatant, so that a hesperidin extracting solution is obtained. Hesperidin is extracted from pericarpium citri reticulatae by using an ethanol solution, so that the extraction yield is high, and up to 6.1%. The method for extracting hesperidin from pericarpium citri reticulatae has the advantages of cheap and easily-obtained equipment, simplicity in operation, rapidness, high extraction yield, and the like, and is conducive to mass production.