The utility model discloses a tobacco seedling leaf stereoscopic cutting machine integrating functions of residual leaf cleaning, root cutting and top and lateral leaf pruning. The tobacco seedling leaf stereoscopic cutting machine comprises a lateral leaf pruning cutter, a seedling tray conveying mechanism, a lifting mechanism, a supporting frame, a top leaf pruning device, a root cutter and a residual leaf cleaning mechanism. An upper framework of the lifting mechanism is provided with the seedling tray conveying mechanism, the left side of the seedling tray conveying mechanism is provided with the root cutter, and the upper part in the middle of the seedling tray conveying mechanism is provided with the top leaf pruning device, a lateral leaf pruning cutter and the residual leaf cleaning mechanism from left to right through the supporting frame. According to the utility model, the lifting mechanism can be used for adjusting a working platform flexibly, the residual leaf cleaning mechanism is used for collecting cut residual leaves of tobacco seedlings smoothly and conveniently, and the top leaf pruning device and the lateral leaf pruning cutter are convenient to assemble and maintain; and the tobacco seedling leaf stereoscopic cutting machine is skillful and reasonable in design and convenient to operate, and can be used to realize pruning of top and lateral leaves of the tobacco seedlings, root cutting, as well as cleaning and collecting of the residual leaves of the tobacco seedlings in one step independently, so that the production cost is greatly saved and the working efficiency is increased.