Umbrella rib easy to fold and unfold and umbrella

The umbrella rib easy to fold and unfold comprises a supporting assembly and an umbrella cover assembly, the supporting assembly comprises an umbrella rod and a clamping spring, a clamping hole is formed in the outer side wall, close to the bottom end, of the umbrella rod, the clamping spring is arranged in the umbrella rod, a bending part is arranged at one end of the clamping spring so that the bending part can protrude out of the clamping hole, and the umbrella cover assembly is arranged on the umbrella rod. The umbrella cover assembly comprises a fixed connection block, a sliding barrel, a sliding connection block, a holding block and a plurality of umbrella branches, the fixed connection block is arranged at the end, away from the clamping hole, of the umbrella rod, the umbrella rod is sleeved with the sliding barrel, the sliding connection block and the holding block, the sliding connection block is connected with the end, close to the fixed connection block, of the sliding barrel, and the holding block