The utility model discloses a dual power transfer switch's travel switch overcoat, including the mounting bracket with set up the travel switch on the mounting bracket, still including the insulatingcoating, the insulating coating includes bottom plate and leg, the leg is located the periphery of bottom plate, travel switch sets up on the bottom plate and is enclosed in the travel switch outsideby the leg, the bottom plate sets up on the mounting bracket. The utility model discloses in addition the insulating coating is installed between mounting bracket and travel switch, has reached betterinsulation protection effect to travel switch, improves the resistant impulse withstand voltage ability of travel switch department, and then improves the resistant impulse withstand voltage performance of dual power transfer switch totality, and the security is better.