According to double porosity medium model, cracked concrete is regarded as a composite porous material composed of intact concrete and crack. Based on the equation of water transport in unsaturated concrete and cubic law for fracture flow, the equation of water transport in cracked unsaturated concrete was proposed. Penetration tests on prefabricated cracked concrete blocks were conducted with infiltration device. The influence of initial saturation degree of concrete, water binder ratio and crack width on penetration depth was studied. TOUGH 2software was applied to numerically analyze the change of water saturation and flow velocity in cracked concrete, after that, penetration depth was calculated according to the average flow velocity and compared with the test results. The results show that the less the initial saturation degree of concrete and the greater the crack width, the greater the penetration depth. Moreover the penetration depth inereases fast at first and then slows down. It reflects that matric potential is driven force of water transport in cracked concrete, and crack width is positively correlated with concrete permeability. Both the difference of flow velocity and the average flow velocity go down with increasing time after water infiltrating in cracked concrete. The penetration depth calculated by average flow velocity can better reflect the trend of penetration tests.