Manufacturing method of composite flexible insulator

The invention relates to a composite flexible insulator and a manufacturing method and application thereof. The composite flexible insulator comprises a flexible shaft, a shed, a grading ring and a connecting interface, wherein the flexible shaft comprises a core and a protecting sleeve; the protecting sleeve coats the core; the shed is uniformly distributed outside the protecting sleeve; and the two ends of the core are respectively fixed with the grading ring and the connecting interface. The manufacturing method comprises the following steps of: (1) forming the flexible core; (2) refining a rubber matrix for the shed and the protecting sleeve; (3) manufacturing the flexible shaft and the shed; and (4) arranging the connecting interface and the grading ring. The composite flexible insulator can be used for high voltage overhead power transmission lines, and serves as a dead end insulator, a V string insulator and a spacing rod for preventing conductors from galloping after being connected with external conductors and supports.