Formwork supporting device of V-shaped concrete cylinder and construction method of formwork supporting device

The invention discloses a formwork supporting device of a V-shaped concrete cylinder and a construction method thereof.The device comprises limiting frames obliquely arranged on the opposite sides of two oblique limbs of the V-shaped concrete cylinder, each limiting frame comprises a plurality of supporting plates arranged in the length direction of the oblique limbs at intervals, and each supporting plate is provided with a first side and a second side which are opposite; a notch for embedding a template of an inclined limb is formed in the first side of each supporting plate, the first sides of the supporting plates are connected with reinforcing rods, and the second sides of the supporting plates are connected with a plurality of reinforcing plates; each bearing frame comprises a plurality of vertical rods arranged in a matrix mode and a transverse rod connected to the vertical rods, the heights of the vertical rods are arranged in a stepped mode, and the vertical rods of each bearing frame are correspondi