A syringe capable of repeatedly using a drive device, and a liquid storage device (100) thereof. The syringe is provided with a liquid storage device (100) and a drive device (200) the liquid storage device (100) is provided with a connection joint (110) and an elastic medicine bladder (120), the elastic medicine bladder (120) is disposed in an inner cavity of he connection joint (110), and the elastic medicine bladder (120) is connected to the inner cavity of the connection joint (110) in a sealing manner the drive device (200) is provided with a jacket (210) and a core bar (220), one end of the core bar (220) is provided with a rubber plug (221), the core bar (220) is disposed inside of the jacket (210) and the rubber plug (221) contacts the inner wall surface of the jacket (210) in a sealing manner, and the connection joint (110) is disposed at an assembly end (211) of the jacket (200) and the elastic medicine bladder (120) is provided with a bladder wall (121) and a bladder cavity (122). The drive device (200) is further provided with a unidirectional fastening structure, and the unidirectional fastening structure is provided with a mounting base (231), an injection clip (232), and an elastic part (233) the core bar (220) is further provided with a clipping position (222), a clip end (2321) is fastened to the clipping position (222). The syringe can repeatedly use the drive device, so that the money spent by the patients is saved and the raw materials are greatly conserved, thereby conforming to the environmental requirements.Seringue capable dutiliser de manière répétée son dispositif dentraînement, et dispositif de stockage de liquide (100). La seringue comprend un dispositif de stockage de liquide (100) et un dispositif dentraînement (200) : le dispositif de stockage de liquide (100) comprend un joint de raccordement (110) et une vessie médicale (120) élastique, la vessie médicale élastique (120) étant logée dans une cavité intérieure du joint de raccordement
