Combined door frame with adjustable thickness

The utility model discloses a combined door frame with an adjustable thickness, comprising a movable door frame (1) and a fixed door frame (6), wherein at least two reinforcing plates (10) are disposed on the inner side surfaces of the both sides of the fixed door frame (6); the reinforcing plate (10) is provided with at least one bolt installation hole (11), a bolt (13) and a nut (12) are installed on the bolt installation hole (11), and a bolt adjusting hole (8) is disposed on a fixed door frame (6) corresponding to the bolt (13); a nut location groove (4) corresponding to the nut (12) is disposed on the movable door frame (1), and the nut (12) is installed and located in the nut location groove (4); and a hinge box (9) is disposed on the fixed door frame (6), and a hinge box insertion opening (3) matched with the hinge box (9) is disposed on the movable door frame (1). After utilizing the structure, the combined door frame with an adjustable thickness has the advantages of being simple and reasonable in structure, convenient in processing and installation, high in efficiency, and capable of being installed and used for wall body thicknesses in a certain range etc.