The invention discloses a sulfur-hexafluoride circuit breaker installing and protecting device. The sulfur-hexafluoride circuit breaker installing and protecting device comprises a protecting shelter and a draught fan. The protecting shelter is a cuboid-shaped shell body formed by splicing PVC synthetic fiber cloth air bags, the PVC synthetic fiber cloth air bags are of hollow plate-shaped structures composed of composite layers on the inner sides of the PVC synthetic fiber cloth air bags and PVC synthetic fiber cloth on the outer sides of the PVC synthetic fiber cloth air bags, and the composite layers are made of high-strength and multilayer composite materials. According to the sulfur-hexafluoride circuit breaker installing and protecting device, the arranged protecting shelter has a good sealing property, the composite layers arranged on the inner sides can greatly improve the strength of the PVC synthetic fiber cloth air bags and improve the wind-resistant and compression-resistant properties, and a good thermal-insulating effect is achieved; and dehumidifying and heated dry air is pumped in the protecting shelter, wet air is effectively prevented from entering a binding post of a circuit breaker in the installation process, so that the binding post is prevented from being corroded, and the using quality and the safety performance of the sulfur-hexafluoride circuit breaker are improved.