The invention discloses a coil and cushion block of a dry-type transformer and an umbrella skirt preparation method thereof, wherein the coil comprises an outlet insulator protruding from the coil, the coil and the insulator thereof are epoxy resin casting bodies, and the cushion blocks are DMC, DMC/SMC mixed molding bodies or epoxy resin casting bodies; the coil comprises a coil body and a coil umbrella skirt, the insulator comprises an insulator body and an insulator umbrella skirt, and the cushion block comprises a cushion block body and a cushion block umbrella skirt. A plurality of grooves are arranged around the outer surfaces of the coil body, the insulator body and the cushion block body, and the coil umbrella skirt, the insulator umbrella skirt and the cushion block umbrella skirtare respectively sleeved in the grooves on the surface of the corresponding body, and are filled and fixed by cold silica gel injection into the grooves. Compared with the prior art, the umbrella skirt of the invention is installed after the coil and the cushion block are formed, so the mold requirements of the coil and the cushion block are greatly reduced, the mold stripping is simple, and theclimbing distance length can be matched to design the corresponding umbrella skirt according to the requirements, and the invention is very flexible.