The attenuation and dispersion of seismic wave will occur when seismic wave propagates in patchy-saturated media and is influenced by fluid patch distribution and size.The patch characteristics in turn can be influenced by capillary forces mainly.The effect of capillarity on wave attenuation in patchy-saturated rocks is not fully understood.In view of such a situation,the authors make use of the concept of patch membrane stiffness as a macroscopic expression of capillarity,incorporate the capillary forces into spherical patchy saturation model by changing a pressure discontinuity at patch interfaces,get a new model and compare the variation of wave attenuation and dispersion before and after the consideration of the capillarity based on the new model.It is suggested that considering capillarity will increase seismic velocity and decrease the dispersion and attenuation coefficient.The authors applied this capillary-extended spherical patchy saturation model to interpret velocity-saturation and attenuation-saturation relations.A comparison with the original model shows that the new model can fit the velocity-saturation and attenuation-saturation experimental relation trend well,which suggests that capillary-extended spherical patchy saturation model can have important implications for interpreting velocity-saturation and attenuation-saturation relations in patchy-saturated rocks.