The invention relates to the field of sealing pieces, in particular to a piston combined sealing piece. The piston combined sealing piece comprises a sealing suite, a fastening seat and an arc-shapedconnecting seat, wherein a first air hole is formed in the outer surface of the upper end of the sealing suite; the fastening seat is positioned on the outer surface of the bottom end of the sealing suite; a piston rod is movably mounted on the inner surface of the inside of the sealing suite; rubber bars are uniformly arranged in the piston rod and are close to the side surface; the rubber bars are fixedly connected with the piston rod; a second air hole is formed in the top end of the side surface of the piston rod; and a sucker is fixedly mounted on the outer surface of the top end of the piston rod. The piston combined sealing piece is provided with the rubber bars, the sucker and a V-shaped plate, deformation damage due to extrusion to the piston rod can be relieved, abrasion betweenparts can be relieved, finally, connection between the combined sealing pieces can be tight, and the piston combined sealing piece is suitable for different working conditions, and is good in use prospect.