Flange short piece assembling device

The utility model relates to a construction tool in prefabricated sites, in particular to a flange short pieces assembling device. The technical scheme includes that the flange short piece assembling device consists of a base, a shaft, a centralizing plate and a fastening bolt, the base is integrally connected with the shaft, the centralizing plate consists of two steel plates with shaft holes, one end of each centralizing plate is sleeved on the shaft through the shaft holes, the other ends of the two centralizing plates are opened and closed by utilizing the shaft as the center, and the centralizing plates are respectively provided with a bolt hole used for fixing the centralizing plates. The flange short piece assembling device has the advantages that the flange short piece assembling device saves time and labor when used for assembling flange short pieces, increases assembling quality and accelerates construction speed, thereby increasing work efficiency.