A straight-pole sun umbrella hand-cranking device comprising a standing pole, and a shell fixed on the standing pole, wherein the shell comprises: a first outer shell (Sa), and a second outer shell, which is in a snap-fit with the first outer shell, wherein the shell is fixed on one side of the standing pole, and a rope winding wheel is mounted within the first outer shell and the second outer shell, wherein the rope winding wheel is connected to a cranking shaft, and the cranking shaft is propelled to rotate through a cranking handle connected with the cranking shaft, wherein an anti-slip mechanism is arranged on the cranking shaft, and the anti-slip mechanism is arranged within the inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, the torsion spring is sleeved on 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 second umbrella rope is wound around the rope winding wheel, and a first pulley is arranged within the standing pole, wherein the second umbrella rope penetrates through a wall surface of the standing pole and is connected with a first umbrella rope after passing along the first pulley. a standing pole, and a shell fixed on the standing pole, wherein the shell comprises: a first outer shell (Sa), and a second outer shell, which is in a snap-fit with the first outer shell, wherein the shell is fixed on one side of the standing pole, and a rope winding wheel is mounted within the first outer shell and the second outer shell, wherein the rope winding wheel is connected to a cranking shaft, and the cranking shaft is propelled to rotate through a cranking handle connected with the cranking shaft, wherein an anti-slip mechanism is arranged on the cranking shaft, and the anti-slip mechanism is arranged within the inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, the torsion spring is sleeved on 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 second umbrella rope is wound around the rope winding wheel, and a first pulley is arranged within the standing pole, wherein the second umbrella rope penetrates through a wall surface of the standing pole and is connected with a first umbrella rope after passing along the first pulley. a first outer shell (Sa), and a second outer shell, which is in a snap-fit with the first outer shell, wherein the shell is fixed on one side of the standing pole, and a rope winding wheel is mounted within the first outer shell and the second outer shell, wherein the rope winding wheel is connected to a cranking shaft, and the cranking shaft is propelled to rotate through a cranking handle connected with the cranking shaft, wherein an anti-slip mechanism is arranged on the cranking shaft, and the anti-slip mechanism is arranged within the inner cavity of the first outer shell, wherein the anti-slip mechanism comprises: a torsion spring, the torsion spring is sleeved on 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 second umbrella rope is wound around the rope winding wheel, and a first pulley is arranged within the standing pole, wherein the second umbrella rope penetrates through a wall surface of the standing pole and is connected with a first umbrella rope after passing along the first pulley. a torsion spring, the torsion spring is sleeved on 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 second umbrella rope is wound around the rope winding wheel, and a first pulley is arranged within the standing pole, wherein the second umbrella rope penetrates through a wall surface of the standing pole and is connected with a first umbrella rope after passing along the first pulley.