Treading ring structure of rotating seat

The utility model relates to a treading ring structure of a rotating seat. A tighten component is arranged between a middle pipe of the seat and a tapered sleeve of the treading ring and comprises a tighten body and a fixing ring capable of enabling the tighten body and the sleeve of the treading ring to be fixedly combined. The tighten body is a tapered body which is capable of being correspondingly sleeved with the tapered sleeve of the treading ring. A sleeve hole is formed in the middle of the tighten body and correspondingly sleeved with the middle pipe of the seat. A plurality of grooves are formed in the tighten body. Therefore, the sleeve of the treading ring and the tighten body which are forced with each other and in a tapered shape are used, when the treading ring is pressed downward by treading pressure, the tapered sleeve of the treading ring is closely forced with the tapered tighten body, and therefore the tighten body is tightened and forced tightly on the middle pipe of the seat, and the effe