Locking device of linkage modular LED display module

The utility model is suitable for the technical field of LED display modules. The utility model provides a locking device of a linkage modular LED display module. The display device comprises a display assembly and a frame assembly, the display assembly comprises a screen body, an embedded block, a lock box, a spring bolt, a lock disc and a clamping shaft. The frame body assembly comprises a fixedframe; the embedded block is embedded into the inner side of the fixed frame; a screen body with a lock box is arranged; two lock tongues are movably connected in the lock box, and a lock disc with two lock rails is rotatably connected in the lock box; lock rail is of an arc-shaped structure, a clamping shaft matched with the lock rail is fixed at one end of the lock tongue; a fixing frame used for fixing the screen body is further arranged. Therefore, a user can rotate the lock disc to enable one end of the spring bolt to extend outwards, one end of the spring bolt is located on one side ofthe fixing frame, the fixi