1 (100) syringe injector, including a chassis (102), a chassis (112) and a hole (114), the chassis extending to the base (112) to determine the base (112),The structure of the chassis base (112) is placed on the skin surface (50), and the bracket (106) of the chassis base (102) is a set of (107) small needle micro needle heads (102) for mounting in the chassis base (114),The support (106) of the micropipette combination is a movable support (102) at least partially located between the hole (102) of the chassis (114) and the hole (102) of the chassis bottom (112), which is a zoom position, and the zoom position (107) is a zoom type Micropipette combination.Or a chassis (102), so that when the chassis base (112) is placed on the skin surface (50), when the chassis base (102) is connected with the chassis base (106), the small syringe base (107) does not contact the skin surface (50).And a wide area, that is, when the chassis base (112) is located on the skin surface (50), at least a part of the small syringe can contact the skin surface (50) through the opening, while the small syringe base (107) can contact the skin surface (106) through the bracket. a. A mobile driver (104) for moving on the chassis (102) and the micropipette assembly bracket (106) between the first position and the second position so as to move the bracket (106) of the complete micropipette bracket from the back to the extended position；At least part of the drivers (104) are adjacent to the chassis base (112) (102), and are set to move from the first position to the second position in response to the chassis surface pressure (50), while the drivers (104) are in the first position, The external surface of the driver (133) extends beyond the bottom of the chassis (112) (102), while when the driver (104) is in the second position, the external surface of the driver (104) does not extend beyond the bottom of the chassis (112) (102),O extends beyond the chassis base (112) (102), the second distance bein
