High-expanding-diameter umbrella-shaped supporting tool for layer selection and water plugging and using method of high-expanding-diameter umbrella-shaped supporting tool

The invention provides a high-expanding-diameter umbrella-shaped supporting tool for layer selection and water plugging and a using method of the high-expanding-diameter umbrella-shaped supporting tool. A supporting rod locking part penetrates through a center pipe and is located at the T-shaped end of the center pipe, an umbrella-shaped hanging cap penetrates through the center pipe and is fixed to the head end of the center pipe, and an outer supporting rod rotating shaft is arranged in the umbrella-shaped hanging cap; the head end of the outer supporting rod is rotationally connected with the outer supporting rod rotating shaft, an inner supporting rod lower rotating shaft is arranged in the middle of the center pipe, the inner supporting rod is rotationally connected with the inner wall of the outer supporting rod through the inner supporting rod lower rotating shaft and the inner supporting rod upper rotating shaft, and the outer supporting rod compression spring is arranged between the center pipe and t