In order to obtain the plugging slurry and plugging technology suitable for the old well in Hutubi gas storage，composite superfine cement slurry system and G level micro expansion fiber cement slurry system were used to plug the production layer and wellbore of old well separately. The performances of two plugging system were evaluated and the sectional extrusion and successive pressure test plugging technology of old well was put forward. The results showed that the composite superfine cement slurry system had good stability and injection ability，and the compressive strength reached 16.6 MPa，fully meeting the requirements of plugging production layer in field application. The G level micro expansion fiber cement slurry system had good fluid barrier property and mechanical deformation capacity. The cement stone had lower permeability，higher saturated kerosene breakthrough pressure and higher wall cementation intensity. The flexural strength of cement stone reached 12.0 MPa，meeting the requirements of plugging wellbore in field application. Two typical wells had been successfully plugged with the developed cement slurries and technology，demonstrating the feasibility of this technology.