There are a large number of microorganisms such as bacteria and fungi in the soil, which affect the physical and mechanical properties of the rock and soil. Microbial solidification technology is the use of microbial metabolism to induce mineral precipitation, thereby changing the soil structure and improving the physical and mechanical properties of the soil. This article uses microbial activated magnesium oxide solidification technology to treat red clay samples, and explores the effects of magnesium oxide content, bacterial solution concentration, and initial moisture content on the shear strength and disintegration of red clay. The experimental results are explained reasonably through scanning electron microscopy experiments and ImageJ quantitative analysis software. The experimental results show that the shear strength of red clay is positively correlated with the content of magnesium oxide and bacterial solution concentration, but negatively correlated with the initial moisture content; The hydrated magnesium carbonate generated in the experiment is the key reason for the improvement of shear strength. Hydrated magnesium carbonate can play a role in bonding red clay particles and filling the pores of red clay; Significant reduction in disintegration of microbial magnesium oxide solidified red clay.

来源平台：DEVELOPMENT AND PROTECTION OF MINERAL RESOURCES