Adjustable forklift portal frame

The utility model relates to the technical field of forklift equipment, in particular to an adjustable forklift door frame which comprises a frame of a frame type structure, and the bottom of the frame is connected with a saddle. The first lifting frame and the second lifting frame are arranged on the vehicle frame in a lifting mode through two first guide components. The first lifting assembly is arranged on a supporting plate arranged below the frame and connected with the second lifting frame, and when the second lifting frame ascends and descends, the first lifting frame and the first lifting assembly can ascend and descend synchronously; the second lifting assembly is connected with the two lifting frames and used for driving the first lifting frame to ascend and descend on the second lifting frame. The two fork rods comprise vertically-arranged mounting parts and horizontally-arranged supporting parts, and the two mounting parts are symmetrically arranged on the second lifting frame; the adjusting assem