Combined door frame convenient to transport and install

The utility model relates to the technical field of door and window structures, in particular to a combined door frame convenient to transport and install, which is characterized in that a folding door frame comprises longitudinal supporting plates and transverse supporting plates, the transverse supporting plates are installed between the longitudinal supporting plates, and the transverse supporting plates are rotatably connected with the longitudinal supporting plates; a groove used for installing a right-angle fixing plate is formed in the connecting position of the longitudinal supporting plate and the transverse supporting plate, and the right-angle fixing plate is detachably connected with the folding door frame. The fixed door plate is connected with the longitudinal supporting plate through a plurality of first connecting pieces, and a plurality of second connecting pieces used for being connected with a wall are arranged on the fixed door plate. The door frame solves the problem that in the prior art