Cementing cement stone is a natural brittle material, which will cause the fracture of the cement sheath and seal failure. Therefore, in order to prevent the cement stone from being destroyed by the impact of external load, this paper uses 1mm carbon fiber and 0.7mm carbon fiber mixed in a ratio of 4:1 to liquefy and disperse the carbon fiber. The liquid fiber has good dispersibility and can be uniformly dispersed in the cement slurry. The epoxy resin is modified to obtain the resin glue, which improves the flexibility and disperses the stress, thereby enhancing the comprehensive mechanical properties of the cement stone. The influence of the synergistic effect of liquid fiber and resin emulsion on the mechanical properties of cement stone was studied in the laboratory. The results showed that the mechanical properties of cement slurry mixed with 1% liquid fiber and 3% resin glue were better than those of ordinary cement stone, single-doped liquid fiber or resin emulsion elastic-tough material. When the amount of liquid fiber is 1% and the amount of resin emulsion is 3%, the compressive strength of cement stone is 43.2 MPa, the flexural strength is 14.1 MPa, and the impact strength reaches 2.39 KJ·m-2 after 14 days of curing. Compared with the elastic limit strain of cement stone, it increased by 93.2%, the elastic modulus decreased by 74.2%, and the elasticity of cement stone improved obviously. The cement slurry constructed by liquid fiber and resin emulsion has good strengthening and toughening effect, which ensures the long-term sealing of cementing cement sheath under external load environment and improves the impact resistance of cement stone.