Method for halting web press

The utility model relates to a method for halting a web press. The web press comprises at least one reel changer, at least one printing unit at the lower stream of the reel changer, a paper web guide and/or diversion unit at the lower stream of the printing unit, a folding unit at the lower stream of the paper web guide and/or diversion unit, and at least one paper web monitoring device for monitoring the paper web of the printing material. When the power voltage is broken off or the power voltage is in short supply: a) using at least one accumulator buffer for the control voltage of the web press electronic assembly; b) unbuffering the power side power voltage for the electric driver of the press group so that when the barrel and the roller actively driven by the electric driver in printing work of the press group are broke over or the power voltage is in short supply, the roller and the barrel decelerate and stop; and the press unit is removed to the press and separation position so that the impression barr