An autorotating retraction structure of needle seat components of a safesyringeincludes a cylinder (10), a needle seat group (A), and a push rod (20). Theneedleseat group (A) includes an annular rotating member (30) and a rotationlimitingmember (40) pivoted with each other, a passive rotating portion (38) disposedinsidethe annular rotating member (30), a non-circular slot (45) disposed inside therotationlimiting member (40), the passive rotating portion (38) and the non-circularslot (45)forming an automatic eccentric rotation device of the needle seat group (A),and adialing portion (24) and a non-circular section (28) respectivelycorresponding to thepassive rotating portion (38) and the non-circular slot (45) disposed at afront sectionof the push rod (20). When the push rod (20) is pushed forward, an engagingslot (31)of the needle seat group (A) and a corresponding engaging stopper (11) of thecylinder (10) autorotate from a limiting locking state to a non-limitingunlocking statethrough the automatic eccentric rotation device of the needle seat group (A),and atthe same time the push rod (20) is disposed in the needle seat group (A), sothat it isconvenient for a user to retract an injection member (50) and the needle seatgroup (A)into the cylinder (10) after injection is completed.
