Holding tool for supporting frame body

The utility model provides a holding tool for a supporting frame main body. The holding tool comprises a base, a forming middle die, a forming left die, a forming right die and a forming lower die. The forming middle die is fixedly installed on the plane of the base, and the shape of the periphery of the forming middle die is consistent with the theme shape of a to-be-held supporting frame. The forming left die, the forming right die and the forming lower die are distributed on the base planes on the left side, the right side and the lower side of the forming middle die; the forming parts of the forming left die, the forming right die and the forming lower die correspond to the left side, the right side and the lower side of the forming middle die; and the forming left die, the forming right die and the forming lower die are respectively connected with driving devices for driving the forming left die, the forming right die and the forming lower die to linearly move on the plane of thebase. The supporting fram