This　writing　inquires　into　the　issue　of　observer-based　dynamic　event-triggered　fixed-time　adaptive　fuzzy　consensus　control　for　nonlinear　multi-input　multi-output　(MIMO)　multi-agent　systems　(MASs)　with　unmeasurable　states　and　disturbances.　On　the　basis　of　fuzzy　logic　systems　(FLS),　an　FLS　observer　was　designed　to　dispose　of　unmeasurable　states.　Under　the　framework　of　backstepping　technique　design,　a　practical　adaptive　fixed-time　control　method　is　proposed　by　combining　FLS　observer　with　fixed-time　theory.　In　the　course　of　designing　the　controller,　a　hyperbolic　tangent　function　is　introduced　to　tackle　the　singularity　problem　that　may　pertain　in　the　derivative　of　the　controller,　thereby　shunning　the　phenomenon　of　chattering　and　diminishing　the　computational　complexity.　For　the　sake　of　lessening　the　communication　burden　of　MASs,　a　modified　dynamic　event-triggered　mechanism　(DETM)　is　proposed.　The　developed　controller　assures　that　all　signals　of　the　MASs　are　bounded,　and　the　consensus　tracking　errors　converge　to　a　small　neighbourhood　of　the　zero　within　a　fixed-time　interval.　Ultimately,　multiple　UAVs　were　simulated　as　examples,　and　the　emulation　outcomes　display　that　the　availability　of　the　presented　control　scheme　was　certified.