According to the highly nonlinear deformation characteristic of rocks caused by the change of voids （including initial and secondary voids），firstly，rocks can be regarded as composed of two parts: particle skeleton and voids.Then the relationships between macroscopic and microscopic aspects in stress and strain of rocks were developed by combining macro-analysis and micro-analysis respectively，which have revealed the deformation mechanism of voids rocks and have provided a theoretical basis for the simulation of the full deformation process of rocks.Afterwards，based on these researches，a new damage model considering the effect of voids change was established by Lemaitres hypothesis of strain equivalence，and then a statistical damage constitutive model stimulating the full deformation process for rocks was thus proposed by introducing statistical damage theory and the methods for determining its parameters was simultaneously given.This model can reflect not only the property of strain softening but also the nonlinear deformation characteristic of rocks caused by voids compression.Finally，through example analysis and comparison between the measured curves and the theoretical curves for this paper and similar models，the rationality and superiority of this model and methods have been indicated.