<p>Offshore wind power plays a crucial role in the global development of clean energy. However, the concrete piles of offshore wind turbines face the problem of frost heave cracking in cold sea areas. In this study, the meso-scale frost heave cracking mechanisms of concrete is investigated. Traditional smoothed particle hydrodynamics (SPH) method is improved. A fracture marker is introduced to simulate the progressive failure processes of particles, and a method for generating the meso-structures of concrete is proposed. By embedding the temperature equation and combining with the equivalent thermal expansion method, the frost heave cracking process of concrete is simulated. Simulation schemes with different aggregate percentages, aggregate sizes, pore percentages, and prefabricated fissure angles are set up to study the influence of various factors on the frost heave cracking of concrete. The results show that different factors have a significant impact on the frost heave cracking of concrete. The improved SPH method can effectively simulate the frost heave cracking process of concrete. Compared with traditional numerical methods, it has more obvious advantages in dealing with particle failure and complex meso-structures. This study reveals the laws of concrete frost heave cracking under different meso-structure factors, providing a solid theoretical basis for the anti-frost heave design of concrete piles in offshore wind farms.</p>