The organic-inorganic phosphorus-based hybrid flame retardants are attractive owing to the high efficiency in promoting flame retardancy and suppressing the smoke and toxic gases, yet their preparation has been seldom reported. Herein, ammonium polyphosphate (APP) was decorated by organophosphorus triazole (D-ATA) with Fe (III) as the medium through the interfacial coordination strategy for the construction of the hybrid (APP@FeDT), which was expected to address the issues related to the combustibility, harmful smoke and toxic gases of epoxy resin (EP). APP@FeDT showed better compatibility in EP than APP owing to the enhanced roughness and organophosphorus-based triazolyl. Compared to pristine EP, EP with 6 wt% APP@FeDT achieved the UL-94 V-0 rating and the LOI of 29.6 %, and its PHRR, THR and TSP were reduced by 81.4 %, 64.1 % and 66.5 %, respectively. Generally, this work provides a feasible strategy for the preparation of phosphorus-based hybrid flame retardant and reveals its potential application in high fire safety polymers.