The utility model relates to an embedded duct piece sealing gasket which comprises an embedded part embedded in a duct piece, the embedded part is provided with at least two protruding anchor angle structures, and the anchor angle structures are embedded in the duct piece, so that the contact surface between the embedded part and the duct piece is a non-straight surface; wherein the embedded partprotrudes out of the duct piece and corresponds to the circular seam and/or the longitudinal seam, the embedded part and the pre-embedded part are connected into a whole, and a binding face is formedon the side, away from the duct piece, of the embedded part. The sealing gasket has the beneficial effects that part of the sealing gasket is pre-buried in the duct piece, and an anchor angle structure is formed on the surface of the pre-buried part, so that a non-straight contact surface is formed between the pre-buried part and the duct piece, underground water is difficult to permeate into a tunnel through the non-straight surface, and the effect of preventing water seepage is achieved. In addition, the sealing gasket is fixed to the duct piece in an embedded mode, the pasting step is omitted, and the construction efficiency is high.