A straight-pole sun umbrella hand-cranking structure comprising: a standing pole, and a shell fixed on the standing pole, wherein the shell comprises: a first outer shell, and a second outer shell which is in a snap-fit with the first outer shell, wherein the shell is integrally fixed with one side of the standing pole, and a gear is arranged within the first outer shell and the second outer shell, wherein a cranking shaft passes through the gear and is connected to an anti-slip mechanism, and a cranking handle is externally connected to the cranking shaft, wherein the anti-slip mechanism is arranged in an inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, wherein the torsion spring is sleeved on the end portion of the cranking shaft, and the outer surface of the torsion spring is in contact with the inner cavity of the first outer shell, wherein a telescopic rod is arranged in the standing pole, an inner sliding sleeve is arranged at the bottom of the telescopic rod, and a rack is fixedly arranged between one side of the telescopic rod and the inner wall of the standing pole, wherein an opening is formed in the standing pole for receiving the gear, and the gear is assembled into the opening such that it is meshed with the rack. a standing pole, and a shell fixed on the standing pole, wherein the shell comprises: a first outer shell, and a second outer shell which is in a snap-fit with the first outer shell, wherein the shell is integrally fixed with one side of the standing pole, and a gear is arranged within the first outer shell and the second outer shell, wherein a cranking shaft passes through the gear and is connected to an anti-slip mechanism, and a cranking handle is externally connected to the cranking shaft, wherein the anti-slip mechanism is arranged in an inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, wherein the torsion spring is sleeved on the end portion of the cranking shaft, and the outer surface of the torsion spring is in contact with the inner cavity of the first outer shell, wherein a telescopic rod is arranged in the standing pole, an inner sliding sleeve is arranged at the bottom of the telescopic rod, and a rack is fixedly arranged between one side of the telescopic rod and the inner wall of the standing pole, wherein an opening is formed in the standing pole for receiving the gear, and the gear is assembled into the opening such that it is meshed with the rack. a first outer shell, and a second outer shell which is in a snap-fit with the first outer shell, wherein the shell is integrally fixed with one side of the standing pole, and a gear is arranged within the first outer shell and the second outer shell, wherein a cranking shaft passes through the gear and is connected to an anti-slip mechanism, and a cranking handle is externally connected to the cranking shaft, wherein the anti-slip mechanism is arranged in an inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, wherein the torsion spring is sleeved on the end portion of the cranking shaft, and the outer surface of the torsion spring is in contact with the inner cavity of the first outer shell, wherein a telescopic rod is arranged in the standing pole, an inner sliding sleeve is arranged at the bottom of the telescopic rod, and a rack is fixedly arranged between one side of the telescopic rod and the inner wall of the standing pole, wherein an opening is formed in the standing pole for receiving the gear, and the gear is assembled into the opening such that it is meshed with the rack. a torsion spring, wherein the torsion spring is sleeved on the end portion of the cranking shaft, and the outer surface of the torsion spring is in contact with the inner cavity of the first outer shell, wherein a telescopic rod is arranged in the standing pole, an inner sliding sleeve is arranged at the bottom of the telescopic rod, and a rack is fixedly arranged between one side of the telescopic rod and the inner wall of the standing pole, wherein an opening is formed in the standing pole for receiving the gear, and the gear is assembled into the opening such that it is meshed with the rack.