岩土的物理力学指标具有很强的区域性。同一指标，不同地区可能有不同的分布特征。总结和发现工作区内岩土参数的变化规律和分布特征，是提高岩土工程可靠性和工作水平的基础性工作。用数理统计方法对张家口市区4个地质单元两大类土的性质进行了分析，发现了一些有实用价值的分 The physical and mechanical indicators of rock and soil are very regional. With the same indicator, different regions may have different distribution characteristics. Summarizing and discovering the changing rules and distribution characteristics of geotechnical parameters in the work area is the basic work to improve the reliability and work level of geotechnical engineering. The mathematical statistics method was used to analyze the properties of two major soils in four geological units in the urban area of ​​Zhangjiakou, and some useful values ​​were found.