A microphone multi-channel integrated device comprises a speaker body which comprises a main cavity structure. A main cavity speaker, a first auxiliary cavity structural member, a main cavity diaphragm assembly and a second auxiliary cavity structural member are mounted in the main cavity structure through mounting holes. A closed main cavity is defined by the main cavity diaphragm assembly, the main cavity speaker, the first auxiliary cavity structural member, the second auxiliary cavity structural member, an upper main cavity sealing cover, a lower main cavity sealing cover and the main cavity structure. Closed auxiliary cavities are defined by the first auxiliary cavity structural member, the second auxiliary cavity structural member and corresponding auxiliary cavity speakers. Sounds are made mellow and rich by means of the three cavities, and the symmetrical arrangement of parts can reduce squeaking of a microphone caused by resonance.