The invention discloses an expansion bolt. The expansion bolt comprises a screw, a round expansion pipe, a flat washer, a spring washer and a nut; the front portion of the screw is provided with an outer thread matched with the nut, the back portion of the screw is provided with an expansion head shaped like a circular truncated cone, the diameter of the front-side bottom face of the expansion head is smaller than that of the back-side bottom face of the expansion head, and the diameter of the back-side bottom face of the expansion head is larger than the inner diameter of the expansion pipe; a plurality of strip-shaped grooves which extend in the axial direction of the expansion pipe and are connected to the back end of the expansion pipe in a cut-through manner are circumferentially and evenly distributed on the back portion of the expansion pipe, the screw is sleeved with the expansion pipe, the front portion of the screw stretches out from the front end of the expansion pipe, and the expansion head is clamped into a pipe cavity of the expansion pipe through the back end of the expansion pipe; the nut, the spring washer and the flat washer are sequentially installed on the front portion of the screw from front to back; the front portion of the expansion pipe is circumferentially provided with an arc-shaped notch connected to the pipe cavity in a cut-through manner, and the central angle corresponding to the circular arc of the notch ranges from 30 degrees to 120 degrees. According to the expansion bolt, the useless aesthetic problem of the expansion bolt is solved, and potential safety hazards generated due to the fact that the expansion bolt is removed in a cutting manner are avoided.