The invention relates to a novel integrally-separating safety window which comprises safety glass, wherein glass barrier strips are arranged at two sides of the safety glass, the lower end of the safety glass is provided with a sealing and separating device which comprises an inner L-shaped holding strip and an outer L-shaped holding strip that are used for clamping the safety glass on a window of a carriage, the inner L-shaped holding strip is fixed on the window of the carriage and connected with a plurality of brackets for installing the safety glass and rotating around the inner L-shaped holding strip, the other ends of the brackets are fixedly connected with the outer L-shaped holding strip, a lock is arranged below the window of the carriage, the lock comprises an eccentric plate, the lower end of the eccentric plate is connected with a rotating handle and the upper end of the eccentric plate is connected with a lock connecting strip; and the outer L-shaped holding strip is provided with a groove which is matched with the lock connecting strip to ensure that the outer L-shaped holding strip locks the safety groove. The invention has the advantages of good leakproofness, large escape space for passengers, time and labor saving, convenience for operation, lower manufacture and installation costs and simple structure.