It is found that there is a layer of block stone at the bottom of Liangzhu ancient city wall. In order tofind out the purpose and the effect of the bedding stones, this paper uses GeoStudio software to carry out the fi-nite element calculation, and quantitatively analyzes the stability of the bedding stoneson enhancing the stabilityof the city wall and the consolidation of the drainage. And the three aspects of sedimentation and horizontal de-formation are reduced. The calculation results show that after the pavement of bedding stones, the surface of thefoundation forms a hard shell layer with higher strength and higher modulus, the anti -slip capability of the citywall is enhanced, the stability safety factor of the slope is improved by about 10%- 19%, and the average consol-idation degree of the foundation can be increased by 10.8%-14.9% after the laying ofbedding stones for 100days. The filling speed is allowed to be increased from 8 days to 6 days; the laying of bedding stones can alsoplay a stress-diffusion function, reducing the maximum settlement of the foundation by 47%, and the maximumhorizontal displacement by 39.2%, which is conducive to the reduction of the filling earthwork volume.