Abstract: A finite element model of 3-3 piezocomposites was established according to the homogenization method ,which combined the techniques relying upon representative volume element ( RVE) and periodic boundary conditions. Numerical result s of the model are in agreement with the previous experimental work. In cont rast to the analytical model , the finite element model gives more accurate result s. The effect of material parameters , such as polymer volume f raction , Poisson ratio , Young’s modulus and mat rix geomet ry , on the hydrostatic properties was analyzed based on the model.