提高路基侧向位移测试精度，对于软基处理效果的检验、控制软基的侧向变形速率、指导软基段路基的施工是很有必要的。以意大利 SISGEO 测斜仪为例，阐述了测斜仪的使用习惯和测试原理 , 结合现场实践和理论方法，分析测斜管导槽偏转和扭转问题产生误差的原因，提出相应的解决措施，并通过设计的室内试验验证了导槽偏转处理方法的合理性。从而解决了测斜管偏转及扭转带来的误差问题，为数字测斜仪的使用提供新的经验。

It is very necessary to improve lateral displacement measurement accuracy for checking the treating effect ,controlling the rate of lateral deformation and guiding the construction of soft ground embankment. Taking the Italy SISGEO inclinometer as an example, and according to the field practice and theory method, this paper expounds the use conventions and test principles of the inclinometer, and illustrates the causes of deflection and twist of the inclinometer casing, then puts forward to corresponding solution measures, and meanwhile, designs an indoor test to verify the feasibility of processing method of the casing deflection.Thereby, it has resolved the error problem due to deflection and twist of the inclinometer casing, and provides a new reference to the use of the digital inclinometer.