With the rapid development of city, the utility tunnel plays an increasingly important role in the normal operation of city. The security of utility tunnel in the karst cave area is required to study. Combined with the Benxi City Weining Avenue Utility Tunnel Project, the comprehensive treatment schemes for the utility tunnel crossing the karst caves are put forward, in which two schemes are the grouting filling treatment and utility tunnel baseboard reinforcement to cross the karst caves. The application conditions of the two treatment schemes are analyzed and proposed. For the grouting treatment scheme, the single-grouting plus double-grouting treatment method is proposed for use. For the baseboard reinforcement, the horizontal and vertical baseboard reinforcement scheme suitable for the utility tunnel is put forward.