A delivery device (100) used for delivery of an implant comprises a holder (15), a guide rod (16), and a sliding handle (18). One end of the guide rod (16) is connected to the holder (15), and the other end of the guide rod (16) penetrates the sliding handle (18). Multiple first engagement structures (162) axially spaced apart from each other are disposed on an outer surface of the guide rod (16). The delivery device (100) also comprises a position locking device (17) disposed in the sliding handle (18). The position locking device (17) comprises a tooth block (172) and an elastic component (173). The tooth block (172) is sleeved on the guide rod (16) and is provided with a second engagement structure (1721). The elastic component (173) and the tooth block (172) cooperate to allow the first engagement structures (162) and the second engagement structure (1721) to engage with each other when the elastic component (173) is not compressed or partially compressed, allowing an implant to be in a release-locked state. When the elastic component (173) is compressed until the first engagement structures (162) are separated from the second engagement structure (1721), the implant is in a releasable state. By controlling the sliding position of the sliding handle (18) locked or unlocked with the delivery device (100), the implant can be gradually released or release-locked.
