To explore the influence rule of octogen (HMX) solid content, system temperature, HMX particle size, HMX particle gradation and functional additives etc.on the rheological properties of 2, 4-dinitroanisole (DNAN)/HMX suspensions, the apparent viscosity of DNAN/HMX suspensions under different material state conditions was investigated by a digital viscometer.Results show that the suspension presents Newtonian fluid characteristics when the solid content is 3%.Apparent viscosity of the suspension can be described with Ostwald-deWaele model when the HMX solid content is 12%-30%, and the value of nonNewton index n is decreased from 0.842 to 0.374.The influence of temperture on the apparent viscosity can be described by the Arrhenius equation when the temperture is in the range of 95-116℃, and the activation energy E_a increases from 25.97 kJ·mol^-1 to 30.17 kJ·mol^-1.The apparent viscosity decrases as the particle size increases.When the particle gradation ratio of 999.5 μm particle size to 132.6 μm is 2:1, the apparent viscosity reaches the minimum and the solid content is up to 80%.Functional additives N-methyl-4-nitroaniline (MNA) and tri (β chloroethyl) phosphate (CEF) make the apparent viscosity of the suspensions decrease, while dehydrated sorbitol monostearate polyoxyethylene ether (Tween 60), microcrystalline wax-80(MV80), cellulose acetate butyrate (CAB), and thermoplastic polyurethane-5720(TPU 5720) make the the apparent viscosity of the suspensions increase.