Integrated structure of preparation syringe

A preparation syringe system, comprising a stretchable piston, a barrel, a needle, an exposed rubber plug, a first sealing sheet, a second sealing sheet, a built-in rubber plug, a sealing rubber plug, and an engaging rubber plug, wherein the stretchable piston, the barrel, the exposed rubber plug, the first sealing sheet, and the built-in rubber plug form an integrated structure,

• wherein one end of the barrel is provided with the stretchable piston, another end of the barrel is provided with a clamping column, the exposed rubber plug is provided on a side of the stretchable piston away from the barrel, the built-in rubber plug is provided inside the barrel, a scale mark is provided on a circumferential surface of the barrel, the sealing rubber plug is removably inlaid and sleeved on the clamping column, the first sealing sheet is provided on a side of the exposed rubber plug away from the barrel, a blunt end is provided at an end of the needle away from a needle tip, and the engaging rubber plug is provided outside the blunt end,
• wherein the second sealing sheet is provided outside the sealing rubber plug, when the second sealing sheet is revealed and the sealing rubber plug is removed from the clamping column of the barrel, the needle is able to be assembled on the integrated structure through the engaging rubber plug.