Durable auxiliary structural member of blade

The invention discloses a durable auxiliary structural member of a blade. The durable auxiliary structural member comprises a rotating shaft mounting block; a connecting rotating bearing is rotatably mounted on the inner side of the rotating shaft mounting block; the outer surfaces of the two sides of the rotating shaft mounting block are each fixedly equipped with a connecting and mounting plate; the inner sides of the connecting and mounting plates are each fixedly equipped with a bracket fixing guide rail; a plurality of bracket mounting lantern rings are movably installed on the outer sides of the bracket fixing guide rails; and bracket rods are fixedly installed on the outer sides of the bracket mounting lantern rings. According to the durable auxiliary structural member of the blade disclosed by the invention, by elastic retraction movement of a first telescopic rod and a second telescopic rod in a telescopic connecting sleeve, the mounting bracket rods can be elastically supported; the supported blade