The invention discloses a rivet comprising a body part and a core part. The body part comprises a first end and a second end which are opposite. The body part comprises a side wall which is located atthe second end of the body part and extends in the circumferential direction of the body part. The core part is arranged at the second end of the body part. The core part is contained in the side wall of the body part. The core part comprises an end face capable of abutting against at least one workpiece when multiple workpieces are riveted through the rivet, and therefore materials of the riveted workpieces can be extruded by the end face to flow towards the outer side of the core part. A containing space is formed between the core part and the side wall of the body part, and the containingspace is used for containing the materials, flowing into the containing space when the multiple workpieces are riveted through the rivet, of the workpieces and making the side wall of the body part atleast partly deform in the direction towards the outer side of the body part. According to the technical scheme, while it is ensured that the rivet has good locking and attaching capacity, good leakproofness is achieved for the connection positions of the connected workpieces. The rivet is simple in structure and convenient to install, and the production cost can be greatly reduced.