ε-HNIW was respectively coated with Impranil DLF® polyurethane and melamine-formaldehyde resin by demulsification and in-situ condensation polymerization. The mechanical properties and morphology of NEPE propellants containing the coated ε-HNIW were characterized. The results show that compared with the propellant containing uncoated ε-HNIW,the ε_m and the ε_b of the propellant containing ε-HNIW coated with melamine-formaldehyde resin increases by 75.2% and 62.16% respectively,and the ε_b/ε_m ratio decreases to 1.03. The dewetting problem is improved significantly,and the ε-HNIW was bonded on the propellant surface firmly. The ε_m and the ε_b of the propellant containing ε-HNIW coated with Impranil DLF® polyurethane increases a little, the ε_b/ε_m ratio is 1.10 and some ε-HNIW crystals shed from the propellant surface.