This paper, based on the existing LEACH routing algorithm, proposed a novel customizable zoncspanned multi-hop routing algorithm(LEACH-CS) for large-scale, energy limited wireless sensor networks. At first, we introduced the concept of "zone". On this basis,an additional cluster-head may be elected on demand during cluster-head selection process. The purpose is to optimize multi-hop routing with the constraint of multi-zone distance threshold. Our simulation experiment demonstrated that, compared with the existing LEACH protocol, the LEACH-CS could reduce the energy consumption of the cluster-heads significantly and extend the lifccycle of largcscale networks due to more uniformly distributed dead nodes.