Overhead refrigeration unit

The utility model discloses an overhead refrigeration unit, and relates to the technical field of refrigeration units, in particular to a carriage body and a refrigeration unit body, a guide plate is fixed on one side of the carriage body close to a vehicle head, a guide rod is vertically fixed in the guide plate, and a movable plate is movably sleeved on the surface of the guide rod. Connecting bases are fixed to the sides, away from the carriage body, of the movable plates. By arranging the plug pin structure, the fixing bolt, the butt joint block and the butt joint groove, even if the nut and the fixing bolt are loosened due to bumping, the nut and the fixing bolt are not prone to falling off, and the effect that even if the fixing bolt and the nut are loosened, the falling risk is not prone to being caused is achieved; the problem that after an existing refrigerating unit is fixed to a refrigerator car through bolts and jolts, the bolts and nuts are loosened is solved, the buffering shock absorber, the gu