Abstract: Soil is loose deposit produced by the weathering of rocks on the surface of the earth’s crust. Soil in different regions has different physical and mechanical properties. Geotechnical tests is the tests of the physics,mechanics,chemical properties,and minerals of rocks and soils. It has important significance in the design of engineering buildings and provides important parameters for the construction of surveying projects. It is an important part of geotechnical engineering exploration,and its accuracy directly affects the safety and quality of the project. The operation steps of the test of conventional geotechnical engineering are briefly described, the influencing factors of the test data of conventional geotechnical engineering are summarized,opinions and ideas on how to improve the accuracy of the test data are also provided.