In the petrochemical industry, due to the long-term work of the equipment in a harsh environment, it is easy to cause corrosion, rust and other phenomena of the equipment, which seriously affects the performance of the equipment. The use of solvents and emulsions to clean the pipeline surface can only remove the oil, grease, dust and other pollution, but can not remove the rust layer, oxide scale, scale and other dirt on the pipeline surface. The use of wire brushes and other tools to polish the pipeline surface is easy to damage the pipeline surface, and the labor intensity is high, the environment is polluted and the efficiency is low. The use of laser cleaning technology can well solve the above problems.