The appearance of cracks will not only affect the integrity and rigidity of the structure, but also cause the corrosion of steel bars, accelerate the carbonization of concrete, and reduce the durability of concrete and its anti-fatigue and anti-permeability capabilities. Therefore, according to the nature and specific conditions of the cracks, we must treat them differently and deal with them in time to ensure the safe use of the building. The repair measures for concrete cracks mainly include the following methods: surface repair method, grouting, embedding and sealing method, structural reinforcement method, concrete replacement method, electrochemical protection method and bionic self-healing method.