The utility model provides a volute blower and centrifugal fan, wherein, volute blower, include: the roof, bottom plate and baffle assembly, baffle assembly's both ends link to each other with roof and bottom plate respectively, and its characterized in that still includes: locate the resonant cavity of baffle assembly one side, wherein, the resonant cavity includes: the chamber shell, and the connecting pipe, locate one side that the resonant cavity links to each other with baffle assembly, connecting pipe intercommunication resonant cavity and baffle assembly. Through the technical scheme of the utility model, be equipped with the resonant cavity including chamber shell and connecting pipe in one side of baffle assembly, the fluid is when flowing through the baffle assembly who links to each other with the resonant cavity, and the air in the connecting pipe carries out piston motion, and the air rubs with the pipe wall of connecting pipe, thereby turns into heat energy consumption with acoustic energy to reduce and to have volute blower's centrifugal fan at the noise of during operation, promote the user experience in the use.