The utility model relates to a portable ultrashort centre instrument comprising an industrial power module, a charge control module, a data radio station and a centre demodulation board, wherein the power output end of the industrial power module is electrically connected with the power input end of the charge control module; the power output end of the charge control module is electrically connected with the power input end of the data radio station; and a sixth pin, an eighth pin and a ninth pin of a DB-9 port of the data radio station are respectively electrically connected with a second pin, a third pin and a fourth pin of the centre demodulation board. By adopting an integrated module to replace the prior huge and fixed equipment, the portable ultrashort centre instrument can be arranged in a case for carrying, and a new centre station can be rapidly set up when the prior centre station is threatened by flood or machine rooms of the centre station cannot be used caused by other reasons, thereby the security of flood control is ensured. In addition, the centre instrument can be conveniently carried and moved to an overhaul place for use, thereby solving the problem caused by the coordination of the personnel in the centre station.