Curved surface regulating structure of LED display screen and LED display screen

A curved surface adjustment structure for an LED display screen, and an LED display screen. An upper frame and a lower frame of a box body of the LED display screen are both formed by rotatably connecting hinge blocks. Each of the hinge blocks comprises a hinge block body, on which a rotating connecting structure and a locating structure are provided. The rotating connecting structure comprises a lug and a groove body which are respectively arranged on two side edges of each hinge block, and a lateral groove is provided in the groove body; the lug on one hinge block is inserted into the groove of another hinge block which is adjacent thereto, and is movably connected together through a limiting shaft; and an arc-shaped groove hole, which is used as a motion track of the limiting shaft, is provided on the lug.