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There are many problems should be solved in long chain-like ZigBee network which is used to monitor power transmission line, such as the funnel effect of sink node, and the competition of communication between nodes and large data transmission delay caused by enhancing the transmitting power of sensor nodes, this paper provides a method to solve the above-mentioned problems. It is through the multi-sink node cooperation to solve the bottleneck problem, and process the competition of communication between nodes by channel adjustment. Finally, the paper analyzed the method and provided simulation experiment results. Simulation results show that the method can not only solve the funnel effect of the sink node, but also has a good real-time.