The invention provides a dried flower drying device, and relates to the technical field of dried flower processing. The dried flower drying device comprises a drying oven, a connecting block, telescopic devices, an air outlet device, a supporting mechanism and a drying mechanism, the connecting block is arranged above the drying oven, the telescopic devices are arranged on the left side and the right side of the connecting block, the two sides of the bottom end of each telescopic device are fixedly connected with the left side and the right side of the drying oven, the air outlet device is arranged at the right end of the drying oven and fixedly connected with the drying oven, and the supporting mechanism is arranged at the position, close to the top end, of the inner part of the drying oven. Flowers are supported through the supporting mechanism to prevent buds and stems of the flowers from deforming in the drying process, the supporting mechanism is fixedly connected with the drying oven, the drying mechanism is arranged at the position, close to the bottom end, of the inner part of the drying oven, the flowers placed in the supporting mechanism are dried through the drying mechanism, the drying mechanism is fixedly connected with the drying oven, and due to the dried flower drying device, the problem that dried flowers cannot be manufactured on a large scale is solved.