The invention relates to a pressing pressure exchange device, and belongs to the technical field of pressure exchange devices. The pressure exchange device is composed of a first shell, a second shell, a third shell, a fourth shell and a fifth shell which are mutually connected, and an outer cover is cooperatively arranged above the shell to form a buffer cavity; a first elastic piece, a second elastic piece, a first cavity, a second cavity, a third cavity, a high-pressure cavity and a fourth cavity are arranged between the shells. Starting and shutdown of the pressing pressure exchange devicehave delay performance, the time is controllable, the response speed is high, and sewage discharge is thorough; the device is not easy to damage in a humid environment, long in service life, suitablefor long-distance drainage of toilet and kitchen drainage pipes and suitable for cruises and other places needing distributed centralized drainage.