CRTS III type plate-type ballastless-track track-board fine-tuning frame

The invention belongs to the field of high-speed-railway ballastless-track equipment, and relates to a track-board fine-tuning frame, in particular to a CRTS III type plate-type ballastless-track track-board fine-tuning frame. The CRTS III type plate-type ballastless-track track-board fine-tuning frame comprises a prism column. A prism hole is formed in the center of the top end of the prism column (2) and used for placing a micro prism, a cross beam (3) is arranged below the prism column, and two cylindrical bases (4) are connected with the lower portion of the cross beam (3); the vertical axes of the two bases (4) and the prism column (2) are located on the same straight line, the axis of the prism column (2) is located at the center of the link of the axes of the two bases (4), and discs (5) are arranged below the two bases correspondingly; and a fixed positioning pin (7) is arranged below one disc, a bolt-hole movable taper positioning pin (6) is arranged below the other disc, and the circle center of the