The effects of the content and particle size of Al powder in formulation on the impact sensitivity, friction sensitivity and electrostatic spark sensitivity of NEPE propellant were studied. Results show that with increasing the contene of Al powder with particle sizes of d₅₀=90 μm and 41 μm, decreasing the content of HMX in formulation and increasing particle sizes of Al powder, the friction sensitivities of NEPE propellant become lower and electrostatic spark sensitivity was enhanced. The Al powder with smaller particle sizes coated by binder makes the electrostatic spark sensitivities of NEPE propellant lower.