S-shaped multi-seam modular telescopic device

The utility model relates to the technical field of expansion devices, and discloses an S-shaped multi-seam modular expansion device, which comprises two S-shaped side longitudinal beams which are respectively arranged in two reserved notches of an expansion joint and are arranged in parallel, and at least one S-shaped middle longitudinal beam which is arranged between the two S-shaped side longitudinal beams. Through the arrangement of the S-shaped side longitudinal beams and the S-shaped middle longitudinal beams, when a vehicle passes through the telescopic device, the contact time of two tires on the same axis with the S-shaped side longitudinal beams and the S-shaped middle longitudinal beams is staggered, on one hand, the release time of vehicle loads can be staggered, and the impact of the vehicle on the telescopic device within the same time is reduced; on the other hand, the S-shaped side longitudinal beams and the S-shaped middle longitudinal beams are integrally arranged, so that the overall streng