Connection device applicable to flexible display screen

A connection device applicable to flexible display screen, comprising a joint assembly, the joint assembly being defined with main sections, motional axes positioned in the main sections, two ends of the main sections, top sections positioned on the main sections and rotational axes positioned between each two adjacent top sections, the joint assembly being composed of multiple main joints and multiple subsidiary joints, the main joint having a base section positioned in the top section and a first arm and a second arm connected with two ends of the base section, the first arm defining a first chamber positioned in the main section, the second arm defining a second chamber positioned in the main section, the subsidiary joint having a connection section positioned in the top section and a firsthand section and a second hand section extending from two ends of the connection section, the first hand section extending into the first chamber of the main joint, the second hand section extending into the second chamber of another adjacent main joint and latching therewith, every subsidiary joint being rotationally movable about the above-defined rotational axis as a rotational fulcrum in a position between the adjacent connection sections, when rotationally moved, the first and second hand sections respectively serving as the above-defined motional axes to move within the first and second chambers and drive the main joint to move.