[Objective] Experiments on strengthening the abrasion resistance of mitigation engineering by mixing nano silica, micro silica powder, polypropylene fiber and other materials with concrete were carried out to discuss the laws of the influence of the mixing material content on the abrasion resistance, in order to provide scientific reference for the mix design of abrasion resistance of concrete in the debris flow mitigation engineering. [Methods] The underwater abrasive test of concrete specimens was carried out by using the underwater steel ball method (SL352-2006) designed by orthogonal experimental design method, and the abrasive resistance strength of concrete mixed with nano silica, micro silica and polypropylene fiber was obtained. [Results] Within the range of selected content, the abrasion resistance strength of concrete specimens increased first and then decreased with the raise of Nano-SiO₂, and reached the maximum value when the content was 1.5%. With the increase of microsilica powder, the maximum value was reached when the content was 12%. With the increase of polypropylene fiber, it decreased at first, and then increased, and the maximum value was reached when the content was 1.8 kg/m³. With the increase of air entraining agent, it first decreased and then increased, and reached the maximum value when the dosage was 0.005%. [Conclusion] The most significant factor affecting the abrasion resistance strength of concrete is the content of nano silica, followed by polypropylene fiber, micro silica and air entraining agent.