Abstract: The electricity of sensor nodes in wireless sensor networks is very limited, Sensor nodes are often scattered outdoors and their energy consumption depends heavily on the area of coverage and network topology. In the related research, LEACH routing algorithm randomly selects cluster heads in each round to form a cluster network, which may cause additional power consumption and inability to maintain the optimal routes for data transmission. The cluster allocation and routing algorithm proposed in this study is based on the cluster architecture of LEACH, and the objective is to produce clusters with more sensor nodes to balance energy consumption of cluster head and routing prevents the cluster heads from exhausting electric power by forwarding data through detoured routes. The experimental results show that the proposed algorithm can efficiently increase the coverage ratio as well as lifetime of wireless sensor networks.