Gauge-adjustable multi-functional annular rail

The invention relates to a gauge-adjustable multi-functional annular rail which is formed by sequentially splicing a plurality of sections of curve rails, wherein each section of curve rail is a gauge-adjustable module; the gauge-adjustable module is composed of a basic module, a gauge-adjustable rail ballast bed and a mounting base; the gauge-adjustable rail ballast beds are connected onto and mounted on the mounting bases; the mounting bases are connected with the basic modules through foundation bolts; the two adjacent gauge-adjustable rail ballast beds are connected through a connecting plate and a bolt. Compared with the prior art, the gauge-adjustable multi-functional annular rail has the following advantages: the mounting and dismantling are convenient, and the adjustment can be carried out by simply changing corresponding components according to the application.