An arc-shaped adjustment lock, comprising: a base; an adjustment component; and a pressing lock assembly, wherein: the base is connectable to a first LED cabinet; the base has a first arc-shaped portion; the adjustment component is connectable to a second LED cabinet; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that, the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion; the two elastic beads are provided on the second arc-shaped portion, the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group. a base; an adjustment component; and a pressing lock assembly, wherein: the base is connectable to a first LED cabinet; the base has a first arc-shaped portion; the adjustment component is connectable to a second LED cabinet; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that, the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion; the two elastic beads are provided on the second arc-shaped portion, the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group. the base is connectable to a first LED cabinet; the base has a first arc-shaped portion; the adjustment component is connectable to a second LED cabinet; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that, the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion; the two elastic beads are provided on the second arc-shaped portion, the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group.