The utility model discloses a plant volatile composition gathering device, which comprises a working gas source (1), a gathering chamber (5), an absorption device (6) and an air compressor (9). An output pipe of the working gas source (1) is communicated with an inlet of the gathering chamber (5), a gas outlet pipe of the gathering chamber (5) is communicated with the bottom of a working cavity of a cold trap (8), and a gas outlet pipe of the cold trap (8) is communicated with an input pipeline of the gathering chamber (5) via the air compressor (9). The plant volatile composition gathering device uses inactive gas as working gas to gather volatile composition, realizes enrichment by adopting an absorption and condensation manner, is simple in structure, simple and convenient in operation, fine in obtained essential oil quality and high in yield, avoids degeneration of the volatile composition by omitting heating in the whole production process, maintains natural notes of natural plants, and can further reduce production cost by recycling working gas.