The invention discloses an anti-bump structure for LED display units and provides an anti-bump structure, which is good in protective performance and can adjust protective length in different states through an adjusting structure, for the LED display units. The anti-bump structure comprises the LED display units, wherein anti-bump blocks are arranged on the LED display units; an anti-bump block arc edge is arranged on each anti-bump block, a slide groove is formed in the anti-bump block arc edge, an upper bayonet and a lower bayonet are arranged on the slide groove, a bayonet block is arranged on the slide groove and connected with an adjusting screw, and the adjusting screw is connected with a slide anti-bump block and an adjusting button. Damage to the LED display units in processes of packaging, transportation, dismounting, mounting, maintenance and the like is reduced with adoption of the anti-bump structure, and the anti-bump structure is applicable to protection of outdoor LED display splicing boxes.