The invention relates to a combination shielding device used for a 10kV hard insulator and a wire. The combination shielding device comprises an insulator shielding cover and a wire shielding cover. The usage method of the combination shielding device comprises steps: firstly, the wire shielding cover is installed, then the insulator shielding cover is installed on an insulator, the case that the overlapping distance of the insulator shielding cover and the wire shielding cover exceeds 15cm is ensured, and then an operation rod is drawn out. The novel indirect insulation shielding device and the usage method are simple in operation, are safe and reliable, are low in cost, have outstanding effects and are suitable for popularization and application. The combination shielding device and the method are used, an insulator and a wire can be separated, personal electric shock caused by discharge due to the fact that the distance of hot-line work personal to an electrified body does not meet a safe distance can be prevented effectively, potential safety hazards are eliminated fundamentally, operation safety is raised, and the combination shielding device can be applied in temporary insulation shielding of ground potential hot-line work and hot-line work employing an insulation platform effectively.