Swivel supporting system

The invention provides a swivel supporting system, and relates to the technical field related to bridge construction, the swivel supporting system comprises a counter-force seat and an auxiliary supporting mechanism, the bottom of the counter-force seat is used for being inserted into reserved holes in the two sides of an annular slide way; the auxiliary supporting mechanism is fixedly arranged on the upper portion of one side of the counter-force base, and when the counter-force base is inserted into reserved holes in the two sides of the annular sliding way, the bottom of the auxiliary supporting mechanism abuts against the concrete plane on the outer sides of the tops of the reserved holes. According to the swivel supporting system provided by the invention, swivel construction can be carried out by inserting the inserted counter-force seat into a concrete reserved hole before swivel, a permanent structure which is cast together with a turntable in traditional bridge swivel construction is replaced, the co