English：

As an advanced pile foundation construction technology, rotary drilling pile foundations arewidely used in the foundation construction of highways, railways, and large buildings. During the drillingprocess, slurrywall protection technology is commonly employed to prevent wall collapse and ensureconstruction safety. This paper compares the performance of chemical polymer slurry and bentoniteslurry, exploring their applicability under different temperature conditions. The study finds that chemicalpolymer slurry provides better wall protection at low and normal temperatures, and its viscosity issignificantly affected by temperature. In contrast, bentonite slurry exhibits better stability in environmentswith large temperature variations. Specifically, chemical polymer slurry has higher viscosity at lowtemperatures,which helps improve wall protection,while bentonite slurry performs better in high,temperature conditions （ above 35℃）。 Furthermore, the plastic viscosity of chemical polymer slurry islower,which helps reduce pumping energy consumption,while bentonite slurry shows better stability,making it suitable for regions with large temperature fluctuations. Based on experimental results, this paper proposes a reasonable method for selecting slurries under complex climatic conditions, providingscientific guidance for the choice and use of slurry in practical engineering applications.