Intensified multi-fold umbrella rib arrangement

The utility model discloses an intensified umbrella rib device for multiple fold umbrellas. The utility model comprises a top rib (21) pivoted and connected to an upper nest (11) of a middle rod 1, a lower supporting rib (22) pivoted and connected between the top rib (21) and a lower nest (12) which slides on the middle rod 1, a plastic middle rib (23) which is respectively pivoted and connected to the top rib (21) and is pivoted and connected with the lower supporting rib (22) by an inner connecting rib (24), and a tail rib (25) which is respectively pivoted and connected with the plastic middle rib (23) and is pivoted and connected with the top rib (21) by a middle connecting rib (26), wherein the plastic middle rib (23) is provided with an inner joint (231) and an outer joint (232) which are integrally formed and connected to both ends of the middle rib (23).