Arc-fixing rod and arc-fixing mechanism for bendable LED display screen

The invention discloses an arc-fixing rod and an arc-fixing mechanism for a bendable LED display screen. The arc-fixing mechanism for the bendable LED display screen comprises a bendable unit screen, two vertical beams and four arc-fixing rods, wherein the bendable unit screen comprises a vertically-arranged control box and a plurality of transversally-arranged LED lamp bars, the vertical beams are fixed on the back surfaces of the LED lamp bars at the both sides of the unit screen respectively, and the control box is fixed on the back surface of the middle LED lamp bar; the four arc-fixing rods are divided into two groups, the two four arc-fixing rods in the same group are arranged between the control box and the vertical beams up and down, one of the two installation seats of each of the arc-fixing rods is fixed with the vertical beams, and the other one is fixed with the control box. The arc-fixing rod and the arc-fixing mechanism disclosed by the invention are capable of randomly adjusting the radian of t