The invention discloses a forming method for a contact seat and a closed die special for the forming method. The forming method for the contact seat includes the following steps that (1) a rod-shaped pre-forged part is horizontally put between a punch and a die cushion of the die, the top of the outer circumference surface of the pre-forged part faces the bottom surface of the punch, the bottom of the outer circumference surface of the pre-forged part is located on the top surface of the die cushion, the bottom surface of the punch is used for being matched with the top surface of a finished forged part for complementation, and the top surface of the die cushion is used for being matched with the bottom surface of the finished forged parts for complementation; and (2) the punch and the die cushion oppositely forge and press the pre-forged part in the radial direction of the pre-forged part until the pre-forged part is forged and pressed into the finished forged part. During designing of a closed cover die forming technology of the flat type red copper contact seat, according to the structure feature that the length of the contact seat is much larger than the height of the contact seat, the method for forging the rod-shaped pre-forged part in the radial direction for forming is adopted, therefore the forming period of the contact seat is shortened, and the free forging, machining and forming efficiency of the contact seat is improved.