Abstract: The landslide thrust is the important evidence for the designed thrust of anti - slide p ile. It is often cal2 culated with the residual thrustmethod. On the basis of residual thrustmethod, a new method to find the designed thrust of anti - slide p ile is p roposed for an accurate and reasonable result. On the condition of limit equilibrium state and safety requirement, the residual thrust is calculated and reasonable p ile position is determined to make it locate the anti - slide segment of landslide. Residual thrust of landslide lies behind the p ile is adjusted to ensure not only that adjustment quantity can meet safety requirement, but also it can be modify on the basis of the designed thrust of anti - slide p ile. All of this consideration is realized with p rocedure. The method is verified with exam2 p les. It also p rovides reference function for reasonable value of the designed thrust of anti - slide p iles in the future.