Abstract：Slope cutting is a traditional method in landslide treatment. The key issue of slope cutting project is to make it most economical and can maintain stability. In practical engineering，unbalanced thrust force method is used to calculate driving force and residual driving force of slope-sliding blocks，then the optimal dimension and location of slope cutting are searched under the condition that the quantity of the residual driving force of shear outlets of landslide is less than or equal to zero，but its computation is considerably tedious. In allusion to the problem，using the idea of transfer coefficient method，the concept of residual sliding resistance force is introduced and optimal dimension and location of slope cutting can be obtained only after residual sliding resistance force of slope-sliding blocks is calculated. This method doesn¢t need to carry out searching calculation. It is simple and convenient in calculation. The calculation process is as follows：based on the anticipated factor of safety，residual sliding resistance force is calculated inversely starting from the last slide block. The residual sliding resistance force is transferred upwards one by one between the blocks. When the residual sliding resistance force of a block is negative，let it be zero in the next calculation until residual sliding resistance forces of all blocks are achieved. If the residual sliding resistance force of some block is negative，the block is the one that needs to be removed and the quantity of the negative force is the load of the block which needs to be eliminated.
