The invention provides a connecting structure for a syringe needle base and a syringe tube in a safety syringe, and belongs to the technical field of medical devices. The problem that the present self-destructing injector is poor in stability when destroying itself is solved. The connecting structure for the syringe needle base and the syringe tube in the safety syringe, characterized in that the front end of the syringe tube (1) is provided with a connecting tube (1 a) which is smaller than the outer diameter of the syringe tube (1)； a syringe needle base (2) is in the shape of a column, and the front end of the syringe needle base (2) is used for being connected with the syringe needle (3)； the connecting structure comprises elastic connecting pieces (2a) arranged at the rear end of the syringe needle base (2) and first connecting parts (1a1) arranged at the inner side of the connecting tube (1 a)； the outer sides of the connecting pieces (2a) are provided with second connecting parts (2a1)； the syringe needle base (2) is sleeved with the connecting tube (1 a)； the connecting pieces (2a) are provided with an expanding part (5)； the expanding part (5) is abutted against the inner side of the connecting pieces (2a) so that the outer sides of the connecting pieces (2a) are expanded to be in contact with the inner side of the connecting tube (1 a)； under the expanding effect of the expanding part (5), the first connecting parts (1a1) are clamped with the second connecting parts (2a1). The connecting structure for the syringe needle base and the syringe tube in the safety syringe has the advantages of being high in stability and simple in structure.
