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In order to solve the problem of low energy utilization rate and short network life span of wireless sensor network (WSN) data acquisition, this paper uses Mobile Sink (MS) to collect the data of cluster head in a cluster that consists of the cluster head and cluster node, and presents a new algorithm combining cluster head selection and MS path optimization Algorithm (LEACH-sink). The LEACH algorithm is used to select the cluster head and determine the location. Then, the shortest path of MS is planned by the ant colony algorithm and the genetic algorithm based on the position of the cluster head. The MS collects the data of each cluster head through the path . The experimental results indicate that this algorithm can select the cluster head and plan the path of the best data collection in time, which improves the data transmission ratio, energy utilization ratio, cluster head generation ratio and system robustness compared with the traditional algorithm. And the network Life cycle increased by 60%.