The reliability of a communication network influences directly the efficiency and quality of modernized meteorological service， and thus the Zaozhuang Weather Service put great emphasis on the high reliability design and construction of its communication network A introduction is made to the topological structure of the backbone network， the selection of city/countylevel links， the deployment of network facilities， the routing selection and planning of kernel switches， and the design and construction of high reliability redundancy for the communication network The communication networks of citylevel meteorological services play an importance role in public service and national disaster prevention and mitigation， and thus it is necessary and urgent to strengthen the high reliability design and construction of communication networks at citylevel meteorological services.