In order to effectively solve the deformation problem of shallow buried tunnels in karst areas,based on the shallow buried tunnel in karst areas in Guizhou province,the slurry filling and support reinforcement are considered to reinforce,the MIDAS/GTS finite element software is used to analyze the deformation of tunnel surrounding rock and the stress of support structure. The corresponding treatment measures are then proposed for the karst tunnel. The outcomes show that:① The stress and deformation of tunnel in karst area can be reduced by using the advanced support methods of the small conduit and large pipe shed,and the effect of advanced large pipe shed is more obvious than that of advanced small pipe;② The higher the degree of cavity filling,the better the control effect of tunnel deformation,the complete filling play significant role to control the tunnel deformation,hence the quality of grouting should be guaranteed;③ Considering the results of numerical analysis and the actual situation of the karst tunnel,the treatment plan is proposed. The cavity below the tunnel is grouted and filled,the advanced small conduit and large pipe shed are use to reinforce the tunnel.