<p>The reflection behavior of a multiple physical fields coupled waves for four kinds of possible surface conditions of piezoelectric solid with void is studied in this paper. First, the dispersion equation for multiple physical fields coupled waves propagation in the piezoelectric porous media is derived through inserting the multiple physical fields coupled constitutive equations into the general governing equation. Different from the classic piezoelectric medium, there are four coupled elastic waves in the piezoelectric material with void. Due to the consideration of porous effects of the piezoelectric material, the surface conditions can be proposed in different forms. These surface conditions, which include the free surface and elastic surface, electrical short circuit and electrical open circuit, as well as zero volume fraction disturbance surface and zero equivalent force surface, are then used to determine the reflection coefficients of reflection waves. The numerical results are provided for incident QP wave and incident QSV wave, respectively, and are validated by the energy conservation law. Based on these numerical results, the influences of the four kinds of surface conditions on the reflection behavior of multiple physical fields coupled waves are discussed.</p>