Damage in composite materials is multi-scale phenomena – it can initiate in microscale in the form of fiber-matrix interface decohesion or fiber breakage and subsequently lead to the failure behaviors in the structural scale such as crack initiation and propagation. Conventional continuum damage approaches for predicting structural behavior neglect the micromechanical response while detailed micromechanical models are limited to microscale because of the high computational cost. This multi-scale PHCDM model builds a connection between the microscale damage mechanisms and the structural scale failure behavior for composite materials, which is based on Hill-Mandel macrohomogeneity condition. To develop the PHCDM model, representative volume element for the composite system subjected to various loading scenarios is analyzed with detailed micromechanical model. A constitutive law is developed to predict the homogenized response of the RVE, which is parametrically represented as functions of the current damage state in order to account for the change of material responses induced by damage. After calibration, a statistical approach is used to determine the nonlocal characteristic length for this model in order to avoid mesh-sensitivity issue in macroscopic analysis. This model is then implemented as user-subroutines in commercial FEM packages for analyzing composite structures. Meanwhile, the equivalence between micro- and macroscopic behavior enables us to regenerate the detailed micromechanical damage behavior at any location of the structure with the corresponding macroscopic deformation history. This model is also extended to account for various morphologies of the composite system and strain rate effects in order to save the calibration effort for different design scenarios. These features of PHCDM model make it a great tool to design macroscopic composite structures from the microscopic scale.