A novel amino-functionalized magnesium hydroxide (DETA-AA-MH) was synthesized and used as curing agents for epoxy resins．DETA-AA-MH was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray power diffraction (XRD), Solid state nuclear magnetic resonance(SSNMR), nano particle analyzer, field-emission scanning electron microscopy(FESEM) and thermogravimetric analysis (TGA). Crosslinking behavior was found by FTIR and differential scanning calorimetry (DSC), the best mass ratio of curing reaction was epoxy resin(DGEBA, 84.03%) and DETA-AA-MH1 (5.97%), the optimum curing temperature were 80 and 110 ℃. Flame retardance of the EPs was evaluated by LOI tests, compare the data of DGEBA/DETA with DGEBA/DETA-AA-MH, the LOI of DGEBA/DETA-AA-MH was improved by 10.15%. SEM and EDS was employed to investigate the burning residues of EP, confirming that DETA-AA-MH could promote the formation of a protective char layer during burning. The experiments for determining the mechanic properties of DETA-AA-MH cured EPs were also conducted, which indicated that compared to EP (mass fraction 7.38% DETA), Comparing with, the flexural strength, flexural modulus and impact strength of EP(mass fraction 15.97% DETA-AA-MH) were efficiently increased by 669.70%, 33.12%, 228.57%, respectively.