Aiming at improving the plane and micro heterogeneity characteristics of water drive heavy oil field in Bohai，and in order to realize the technical requirement of liquid flow diversion in reservoir，the geological characteristics and fluid properties of LD5-2 reservoir in Bohai were taken as simulation object. The hydration expansion，seepage characteristic and fluid flow diversion effect of microheterogeneous regulators including polymer microsphere and gel dispersion were studied. The results showed that the polymer microsphere had poor light transmittance and the appearance was spherical. While the gel dispersion had good light transmittance and the appearance was irregular slice. The initial median particle diameter of polymer microsphere was 8.7—9.2 μm. The microsphere swelled in injection water. The particle size was basically stable after immersing 7 days and the maximum expansion ratio was 2.5—3.0. Polymer microsphere and gel dispersion had strong injection ability and weak liquid flow diversion ability，which were suitable for micro-liquid flow diversion in low and medium permeability layers. Compared with polymer microsphere，the abilities of water absorption，retention in porous media during migration and liquid flow diversion of gel dispersion were poor. The reservoir with high average permeability and high heterogeneity should be combined with macro and micro fluid diversion measures. That was to say，the combination of strong gel and particles could increase the expand sweep volume and enhance oil recovery greatly.