Photovoltaic support screw pile with vertical fin structure at upper part and use method

The invention provides a photovoltaic support screw pile with a vertical fin structure on the upper portion and a using method.The screw pile comprises the vertical fin structure, a steel sleeve, a spiral steel pile steel pipe and spiral steel pile blades, the spiral steel pile steel pipe is provided with the multiple spiral steel pile blades, and the steel sleeve is arranged on the outer side of the upper portion of the spiral steel pile steel pipe in a sleeving mode; the steel sleeve is located above the spiral steel pile blade at the uppermost end. And the vertical fin structure is arranged on the steel sleeve. By means of the vertical fin structure additionally arranged on the upper portion of the steel pipe of the spiral steel pile, the horizontal bearing capacity of the spiral steel pile is improved, and pile top displacement under the horizontal load effect is reduced. And the purpose of reducing the pile length can be achieved. The pile length is reduced, materials are saved, the efficiency of buildin