The particle size and size distribution of pore-scale elastic microspheres are studied through laser particle size analyzer; using RheoStress600 rotary rheometer and M5600 rheometer, the creep-recovery property of elastic microspheres and their viscous modulus and elastic modulus variation at different frequency and temperature are tested respectively; through the LVDV-II+Pro rotating viscometer, the effect of concentration, temperature, shear rate, salinity on viscosity of elastic microspheres solution are studied. The results show that the elastic microspheres synthesized in laboratory are micron pore-scale feature which matche with the reservoir rock and obey the Weibull distribution. They have better creep-recovery property and viscoelasticity; and the elastic microspheres solution behaves as a pseudoplastic liquid at low temperature and low shear rate condition, moreover, it behaves as an expansibility liquid at middle shear rate condition or high temperature and low shear rate condition, and shows similar Newtonian fluid feature at high shear rate condition; the viscosity of elastic microspheres solution is lower with good mobility and can be injected easily in the process of profile control and flooding; the elastic microspheres solution has better stability and can be used for high temperature and high salinity reservoirs to enhance oil recovery with good reservoir adaptability.