The invention discloses a steel strip pickling bath with a sudden stop device, and belongs to the technical field of steel strip pickling equipment. The steel strip pickling bath comprises a press roll I, a press roll II, pickling pools, pickling pool covers, a wringing roller, a blow drying air knife and the sudden stop device, wherein the press roll I and the press roll II are respectively arranged in the inlet position and the outlet position of the pickling bath; the wringing roller and the blow drying air knife are sequentially arranged in the outlet position of the pickling bath; two or more pickling pools are arranged in the pickling bath; the lower parts of the adjacent pickling pools communicate with each other; a sealed side wall is fixedly connected on the outer side of each pickling pool side wall; the groove formed between each sealed side wall and the corresponding pickling pool side wall is a water seal tank; each pickling pool cover covers the corresponding pickling pool; and the sudden stop device is arranged on one side of the pickling bath. Through the adoption of the technical scheme provided by the invention, the influence caused by equipment halt can be effectively avoided, the leakage and waste of a pickling solution are effectively prevented, and the production cost is reduced.