The invention discloses a kelp clamping discharging device. The kelp clamping discharging device comprises a pair of parallel conveying chains and a supporting frame. The kelp clamping discharging device is characterized in that a plurality of hanging rods are arranged between the conveying chains at intervals, and each hanging rod is provided with a plurality of clamping clips which are positioned by positioning sleeves; a main anti-rotation plate and an auxiliary anti-rotation plate are arranged at a discharging station of the supporting frame, a plurality of opening and clamping sliding blocks are symmetrically arranged on the inner side of the main anti-rotation plate and the inner side of the auxiliary anti-rotation plate, and the adjacent opening and clamping sliding blocks can open the clamping clips which operate and slide into the position between the adjacent opening and clamping sliding blocks; kelp is clamped by the clamping clips to be hoisted, and the clamping clips are opened to conduct automatic discharging at the discharging station. The kelp clamping discharging device is reasonable in structural design, reliable to use, low in labor intensity of workers and high in production efficiency and automation degree.