The utility model discloses a support of control pencil trunk trend and branch's orientation. The technical problem that solves is that the trend of harness branch and trunk can't satisfy the loading requirement, has the potential safety hazard. The utility model discloses a main casing body, the main casing body including last casing and casing down, go up the casing and hinge with casing down and be connected, lower casing and last casing pass through the fastener lock, lower the end part of the housing be equipped with the installation belt, be equipped with the installation in the middle of the lower casing and detain, lower casing and last casing on be equipped with the export groove of mutual symmetry, behind lower casing and the last casing lock each other the export flute profile of symmetry become branch outlet. Adopt behind such technical scheme the utility model discloses, realize that the pencil that the loading required moves towards, satisfy the high temperature resistant and stand wear and tear performance requirement of product again, have the important function to security performance and the aesthetic property that improves the engine.