The utility model discloses a supplementary accurate adjustment and reinforcing apparatus of prestressing force track board open in two -way elder generation of assembled. Hold in the palm, support adjusting bolt and connecting bolt including support, L type top, L type top asks main L type layer board and tray to be formed by connecting, vertical the arranging of a curb plate of L type layer board, and another curb plate level arranges, fixed connection to the side of the vertical curb plate lateral surface of arranging of L type layer board and the tray, the tray is connected to on the support through support adjusting bolt, connecting bolt is installed to the both sides of the vertical curb plate of arranging of L type layer board, is connected with the prestressing force track board that is used for the rail to lay through connecting bolt. The utility model discloses the knot can be convenient for the track board well and stabilize accurate adjustment and reinforcement, ensures assembled track board and lays the precision, and is small, light in weight, convenient transportation.