Concrete is a general term for engineering composite materials that bind aggregates into a whole by cementitious materials. Concrete is widely used in the field of civil engineering. This article is a summary of commonly used anti-corrosion coatings for concrete by workers in the relevant industry based on their own practical testing experience, and focuses on referring to JTJ275-2000 "Technical Specifications for Anti-corrosion of Concrete Structures in Harbor Engineering", and puts forward the analysis of common problems in the testing process of anti-corrosion coatings , hoping to provide some reference experience for relevant workers. As a durable material, concrete material is essentially a non-uniform porous material. Under the erosion of carbon dioxide, water, chloride ions, sulfate and other media, its destruction is accelerated, especially in harbor engineering and bridge engineering. 1. In railway engineering, the environment of concrete is complex and affected by various environmental factors. If anti-corrosion measures are not taken, its service life will be greatly shortened and maintenance costs will increase greatly. Therefore, the anti-corrosion protection of concrete is a very important link.