The utility model relates to a temporary line overhead device for ballastless track disease treatment, and belongs to the technical field of railway ballastless track disease elimination. The temporary overhead device comprises a steel bearing beam, a support, a limiting device and a fastener; longitudinal beams of the steel bearing beams are formed by welding steel plates and have box-shaped sections, and a plurality of fasteners are arranged on upper flanges of the longitudinal beams and used for locking the steel rails and the longitudinal beams. The two ends of each longitudinal beam are supported on the track concrete supporting layer through supports respectively; limiting devices A are arranged at the joints of the longitudinal beams and the supports. Limiting devices B are arrangedat the connecting positions of the longitudinal beam and the first small cross beam and the connecting position of the longitudinal beam and the last small cross beam respectively. According to the utility model, the integrity and the construction convenience of the overhead structure are improved, the vertical and transverse positions of the overhead device can be adjusted, a plurality of sets of overhead devices can be connected, and a plurality of sets of devices can be combined to form an overhead line for a line with a relatively long disease treatment range.