The utility model provides a foundation ditch envelope includes at least that secret wall, reinforced concrete bracing piece, lattice column, concrete joint post, pipa prop, steel-pipe column, concrete tie rod and rigid joint, the reinforced concrete bracing piece sets up underground inside the wall to the reinforced concrete bracing piece is connected with the concrete tie rod, the lattice column sets up in reinforced concrete bracing piece and handing-over department of concrete tie rod to set up underground inside the wall, the steel-pipe column sets up the right-hand member at the reinforced concrete bracing piece to steel-pipe column both ends and secret wall zonulae occludens, the concrete connects the post setting in reinforced concrete bracing piece one end to the concrete connects the inside that the post is located secret wall, pipa props the setting in reinforced concrete bracing piece and handing-over department of secret wall, this simple structure connects closely, and bearing capacity is strong, and the prevention of seepage is effectual, and the practicality is strong, easily uses widely.