A swiveling bridge support comprises a bottom basin, a middle spherical panel and an upper top plate. The swiveling support is characterized in that upper connecting bolts, which are connected by thread, are evenly distributed on the outer side of the upper end surface of the upper top plate; the middle of the lower end surface of the upper top plate is provided with a circular groove; the inner end surface of the groove is provided with a stainless steel circular slider; lower connecting bolts, which are connected by thread, are evenly distributed on the outer side of the lower end surface of the bottom basin; a convex cylinder part, the upper end surface of which is of concave spherical shape, is arranged at the middle of the upper end surface of the bottom basin, and a spherical polyfluortetraethylene plate, the middle spherical panel and a plane polyfluortetraethylene circular plate are arranged in turn on the upper end surface with concave spherical shape from bottom to top; the upper top plate is sleeved on the bottom basin; the stainless steel circular slider is slidingly connected with the plane polyfluortetraethylene circular plate; the lower end part of the inner wall of the circular groove arranged at the middle of the lower end surface of the upper top plate is rotationally connected with the upper end part of the outer wall of the convex cylinder part arranged at the middle of the upper end surface of the bottom basin; an o-shaped rubber sealing ring is arranged between the lower end surface of the wall of the circular groove arranged at the middle of the lower end surface of the upper top plate and the outer side of the upper end surface of the bottom basin.