Abstract: Wear of the inner walls of the ash removal and coal powder conveying pipelines in coal-fired power plants are significant, and wear failure generally occurs at elbows, tees, or pipeline bends. Hard particles have repeatedly impacted and worn the pipeline walls over a long period of time, causing pipeline leakage failure and affecting the safe operation of the boiler. Traditional ways to reduce pipe wear mainly include optimizing pipe design, selecting wear-resistant materials, thickening pipe walls, repairing worn areas and replacing pipes. The new technology represented by the preparation of wear-resistant coating on the inner wall of the pipeline, the addition of wear-resistant lining and the preparation of wear-resistant coating or cladding layer are gradually applied in the field of anti-abrasion protection of the inner wall of thermal power pipelines, which significantly improves the anti-wear ability of the inner wall of the pipeline and shows a good prospect in the anti-abrasion protection of the inner wall of the pipeline of thermal power plants.