The invention relates to a forming process of the cup shape of a spherical head of a nickel-based high-temperature alloy plate, which comprises two stretching steps and a rolling step arranged between the two stretching steps; in the first stretching step, the plate is deformed to form an embryonic form of a product; in the rolling step, a wall that is thinned is thickened into a required size; and in the second stretching step, the shape and the size of the product, which are finally required, are formed; in addition, a forming step is additionally arranged between the rolling step and the second stretching step so as to ensure the shape of the spherical head of the product to be accordant with the requirements of the shape and the size of the spherical head of the product. Through adopting the forming process, the stress wave crest of the stress curve of workpiece is unlimitedly high, thereby the fracture can not appear easily; the spherical part is obtained mainly through rolling, and at last, the precise shape and the precise size are obtained through shaping, and the thickness difference of the wall can be controlled to plus or minus 0.04mm. Invention combines stretching technology with the rolling technology together which make up the respectively defect for each other, and makes the product that can not be processed formerly be processed into the product required by persons smoothly.