Abstract: The engineering geological exploration and stability analysis of complex landslip system is an important basis of design and construction of landslip. The landslip of K160+084~K161+020 at national way 316 in Fujian province is a complex landslip,which composed of two main slip lines. It has both retrogressive and slamping purpose and develops two main slip surfaces and some secondary surfaces. The paper has suggested the content and important parts of engineering geological exploration of complex landslip.The factors of safety of the landslip is 1.025. The landslip is in critical stability and must be controlled early.