The invention belongs to the field of agricultural machinery and discloses a tendril lowering device which comprises a spindle and two sleeves, wherein thread coils are wound on the two sleeves, and the spindle is sleeved with the two sleeves. Interlocking devices are arranged at the opposite ends of the two sleeves to form an interlocking terminal and used for preventing relative rotation between the two sleeves. Locking devices are arranged at the two ends of the spindle and used for fixing the sleeves onto the spindle. By means of the interlocked sleeves and the mode of winding threads on the corresponding sleeves, one tendril lowering device can control two plants to perform tendril lowering at the same time. In addition, the tendril lowering device is easy to operate, high in tendril lowering efficiency and less in labor cost in tendril lowering. The plants are wound on the wires directly, the threads and tendrils cannot perform relative movement during tendril lowering, therefore, damage to the plants during tendril lowering is unlikely to happen, and blooming and fruit setting of the plants and growth and development of fruits are ensured.