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Research the wireless sensor network, propose one architecture of Wireless Sensor Network for sweeping application, and propose one new routing protocol-the multilevel heterogeneous clustering routing protocol. All the wireless sensor network nodes can be divided into four kinds. The first level cluster-heads can be elected based on average hops between cluster-heads, energy dissipation of cluster-heads and so on. The best routing between the first level cluster-heads and the second level cluster-head is searched using three heuristic factors about energy dissipation for communication, energy dissipation of nodes and hops. The routing protocol has been simulated on NS2 and compared with LEACH protocol. The results of simulation demonstrate that this routing protocol can reduce average energy dissipation of nodes and prolong the lifetime of wireless sensor network effectively in sweeping application. 