The utility model discloses a line bundle sheath of car, including the sheath body, the terminal connecting portion have on the sheath body, the inside of sheath body still is provided with the waterproof protective shroud of elasticity, the waterproof protective shroud of elasticity along the circumference of terminal connecting portion encircle set up in the outside of terminal connecting portion. After adopting the waterproof protective shroud of above -mentioned elasticity, even the water in line bundle sheath's the surrounding environment splashes on line bundle sheath, because the effect that blocks of the waterproof protective shroud of elasticity, these water just can prevent also that troubles such as short circuit from appearing in the pencil in being difficult to get into line bundle sheath. Clearly, the utility model provides a line bundle sheath has higher waterproof performance.