A jejunum cannula releasing system adapted to be implanted into duodenum, the jejunum cannula comprising a membrane tube and a stent, the releasing system comprising an implanting device, a pushing assembly, a fixing line and a releasing line, wherein the implanting device comprises a storage tube shell, a releaser, the membrane tube and the stent, wherein the storage tube shell is tubular, the storage tube shell has a proximal opening and a distal opening, the membrane tube and the stent to be released are arranged in the storage tube shell in a folded state, a proximal end of the membrane tube is connected with a distal end of the stent, and the releaser is provided at the distal opening of the storage tube shell and connected with a distal end of the membrane tube; the pushing assembly comprises a push-pull guidewire, an inner tube, a middle tube and an outer tube, which are sleeved on one another from the inside out in sequence and are movable relatively with respect to each other, wherein a distal end of the push-pull guidewire abuts against the releaser; a part of the inner tube is located inside the storage tube shell and connected with the releaser; one end of the middle tube protrudes into the storage tube shell through the proximal opening of the storage tube shell, and the one end of the middle tube is fixedly provided with a pushing block located in the storage tube shell for pushing against the stent; the outer tube is located outside the storage tube shell and has one end directly or indirectly fixedly connected to the proximal opening of the storage tube shell; one end of the releasing line is fixed on the inner tube, and the other end of the releasing line is a free end; and a first end of the fixing line is fixed on the middle tube, and a second end of the fixing line cooperates with the free end of the releasing line to form a slipknot to connect the membrane tube and the releaser, wherein the releaser has an outer circumferential wall and an inner cavity capable of communicating with an inside of the storage tube shell, the releaser is provided thereon with a guidewire quick exchange channel for a further guidewire adapted to guide the implanting device into the duodenum, wherein the guidewire quick exchange channel is formed by direct communication of two channel openings on the releaser, and the two channel openings are both located on an outer surface of the outer circumferential wall exposed to the storage tube shell, the guidewire quick exchange channel does not pass through the inner cavity of the releaser; and the releaser is provided with a guidewire groove cooperating with the push-pull guidewire in a manner of insertion; and the releaser contains a developing material which is able to be developed under X-ray. the releaser has an outer circumferential wall and an inner cavity capable of communicating with an inside of the storage tube shell, the releaser is provided thereon with a guidewire quick exchange channel for a further guidewire adapted to guide the implanting device into the duodenum, wherein the guidewire quick exchange channel is formed by direct communication of two channel openings on the releaser, and the two channel openings are both located on an outer surface of the outer circumferential wall exposed to the storage tube shell, the guidewire quick exchange channel does not pass through the inner cavity of the releaser; and the releaser is provided with a guidewire groove cooperating with the push-pull guidewire in a manner of insertion; and the releaser contains a developing material which is able to be developed under X-ray.