A progressive damage model based on continuum damage mechanics, including a non-linear shear response and a unified mixed-mode intralaminar damage progression, is used to predict low-velocity impact damage of composite laminates. This model can predict four intralaminar damage modes (including matrix cracking and fiber fracture both in tension and compression) and delamination between different layers. The Puck failure criterion is used for capturing damage onset and the damage evolution is controlled by the effective strain on the fracture plane. For damage onset, the lamina′s in-situ effect is taken into consideration, and the characteristic length is used to reduce the mesh dependency. Experimental and numerical results are compared for various impact energies on laminates ［454/-458/454］,［03/45/-45]S,［45/-45/02/90/45/02/-45/45]3 and prove the capabilities of the model.