A　model　of　impulsive　octonion-valued　fuzzy　inertial　neural　networks　(OVFINNs)　with　time-varying　delays　is　established,　and　fixed-time　(FXT)　synchronization　is　investigated　by　using　direct　octonion　approach.　First,　a　new　FXT　stability　lemma　of　impulsive　systems　is　presented　and　the　upper　bound　of　settling　time　is　estimated　by　using　the　average　impulsive　interval　and　comparison　principle.　Second,　two　inequalities　on　fuzzy　logic　are　developed　in　the　field　of　octonion.　Third,　novel　lemmas　are　introduced　based　on　octonion-valued　norm　and　sign　function　to　overcome　the　non　associative　and　non　commutative　laws　of　octonion　multiplication.　Furthermore,　two　new　nonlinear　octonion-valued　controllers　are　directly　designed　to　induce　the　FXT　synchronization.　Then,　according　to　the　improving　FXT　stability　lemma　and　designed　controllers,　some　novel　sufficient　conditions　are　given　to　ensure　FXT　synchronization　of　OVFINNs.　Finally,　two　numerical　simulations　are　given　to　demonstrate　the　correctness　of　the　theoretical　results　and　the　effectiveness　of　FXT　synchronization　in　secure　communication.