The utility model relates to a centrifugal device for RNA extraction. The device comprises a base and a centrifugal box, the base is of a box structure, and an opening is formed in the top of the base. A weight increasing block is arranged in the base; a shock pad is arranged above the weight increasing block; the lower portion of the centrifugal box movably penetrates through an opening in the top of the base and is fixed to the shock pad, a moving mechanism is arranged on the bottom wall of the base, a fixing base is arranged at the bottom in the centrifugal box, a centrifugal inner container is arranged above the fixing base, a transmission mechanism is connected between the fixing base and the centrifugal inner container, and a plurality of containing cavities are formed in the centrifugal inner container. RNA inactivation caused by over-high temperature in the centrifugal box in the centrifugal process can be prevented, the centrifugal tube is easy to take out, and vibration and noise in the centrifugal process are reduced.