The utility model discloses an extraction device for unstable crocin. Extracting tank, a motor is fixedly mounted at the bottom of the extraction tank; the output shaft end of the motor extends into the extraction tank and is fixedly connected with a rotating shaft; a roller is fixedly mounted on the surface of the rotating shaft; small holes are formed in the roller wall of the roller at equal intervals in an array manner; one end, far away from the motor, of the roller is rotationally mounted in the extraction tank through a bearing; one end of the rotating shaft away from the motor is fixedly mounted at the top of the extraction tank; a feeding hole is fixedly formed in the top of the extraction tank and is positioned above the roller; a liquid outlet is formed in one side of the bottomof the extraction tank; a filter plate is fixedly installed at one end of the hollow pipe, a sealing ring is fixedly installed at the bottom of the extraction tank and located at the motor penetrating position, the output shaft end of the motor is fixedly connected with one end of a rotating shaft through a coupler, the other end of the rotating shaft is fixedly installed in a bearing pedestal, the finished product production efficiency is improved, and the production cost is reduced.