A delivery device suitable for delivering an implant into the human body, the implant having rings at the proximal end of the implant for connection to the device, comprising a first stopper and a connecting unit, wherein the connecting unit is disposed opposite to the first stopper and is movable relative to the first stopper, the connecting unit comprises a radial connecting portion and at least two axial shafts which are connected with the radial connecting portion and face the first stopper and the connecting unit cooperates with the first stopper to form a closed lock space, wherein the delivery device further comprises a second stopper disposed opposite to the first stopper and when the connecting unit cooperates with the first stopper to form the lock space, the second stopper is located in the lock space, and wherein the second stopper and the first stopper form a stop unit of the delivery device, characterized in that the delivery device further comprises a push rod and a sheath core which is arranged with respect to the push rod in a penetrating coaxial manner and is movable relative to the push rod, wherein the connecting unit is arranged on the push rod, the stop unit is arranged on the sheath core, and the connecting unit is closer to the proximal end of the delivery device than the stop unit, or the connecting unit is arranged on the sheath core, the stop unit is arranged on the push rod, and the stop unit is closer to the proximal end of the delivery device than the connecting unit, and wherein a first blocking member is arranged on the push rod, a second blocking member cooperating with the first blocking member is arranged on the sheath core, wherein the first blocking member and the second blocking member are both located close to the distal end of the delivery device and the first blocking member is closer to a distal end of the delivery device than the second blocking member and when the first blocking member is in contact with the second blocking member, the push rod can not move in axial direction relative to the sheath core. wherein the delivery device further comprises a second stopper disposed opposite to the first stopper and when the connecting unit cooperates with the first stopper to form the lock space, the second stopper is located in the lock space, and wherein the second stopper and the first stopper form a stop unit of the delivery device, characterized in that the delivery device further comprises a push rod and a sheath core which is arranged with respect to the push rod in a penetrating coaxial manner and is movable relative to the push rod, wherein the connecting unit is arranged on the push rod, the stop unit is arranged on the sheath core, and the connecting unit is closer to the proximal end of the delivery device than the stop unit, or the connecting unit is arranged on the sheath core, the stop unit is arranged on the push rod, and the stop unit is closer to the proximal end of the delivery device than the connecting unit, and wherein a first blocking member is arranged on the push rod, a second blocking member cooperating with the first blocking member is arranged on the sheath core, wherein the first blocking member and the second blocking member are both located close to the distal end of the delivery device and the first blocking member is closer to a distal end of the delivery device than the second blocking member and when the first blocking member is in contact with the second blocking member, the push rod can not move in axial direction relative to the sheath core.