The invention provides a method for rapidly extracting resveratrol from mulberry leaves, which greatly improves the yield and the purity of the resveratrol. The invention provides a set of procedures for extracting and separating high-purity resveratrol from the mulberry leaves, and the pure resveratrol is obtained by the following procedures: backflow extraction by adopting alcohol, membrane filtration, concentration, extraction, decoloration by active carbon, and alcohol crystallization and recrystallization. The integral separation process has low requirement on environment conditions, the separation time is shortest and the purity is highest. Separating materials are easy to obtain and cheap, the separation operation process is simple and easy to control, the purifying efficiency is high by adopting crystallization and recrystallization, and the used solvent is non-toxic.