A connecting structure for the syringe needle base and the syringe tube in the safety syringe, wherein a syringe needle base is in the shape of a column, and the front end of the syringe needle base is used for being connected with the syringe needle； the connecting structure comprises elastic connecting pieces arranged at the rear end of the syringe needle base and first connecting parts arranged at the inner side of the connecting tube； the outer sides of the connecting pieces are provided with second connecting parts； the syringe needle base is sleeved with the connecting tube； the connecting pieces are provided with an expanding part； the expanding part is abutted against the inner side of the connecting pieces so that the outer sides of the connecting pieces are expanded to be in contact with the inner side of the connecting tube.
