The utility model relates to a pneumatic three-way change valve. The pneumatic three-way change valve comprises a valve body, a change valve plate assembly mounted in the valve body, and a pneumatic device, wherein the pneumatic device comprises an air cylinder, a handle, and a moment axis for connecting the valve body and the pneumatic device. The pneumatic three-way change valve of the utility model has the advantages of simple structure, good sealability and long service life.