The energy consumption problem that exists in traditional time synchronization algorithm because of ex-changing more packets to obtain synchronization accuracy. According to the special network structure in underground coal mine, on the basis of the analysis of bidirectional pair and one-way broadcast synchronization mechanism,combine both synchronization mechanisms with the transmission characteristics of radio effectively,and a two-way synchronization algorithm based on clusters structure which at the characteristics of the passive and low power is proposed. Experiments show that,synchronization algorithm which been proposed can solve the problems of exchanging packets frequently effectively,in the range of allowable error can reduce message consumption and bal-ance the network energy.%针对传统时间同步算法通过交换较多数据包来获取同步精度而导致能耗过大的现象，结合煤矿井下网络结构的特殊性，在分析双向成对同步机制和单向广播同步机制基础上，利用广播传输特性将2种机制有效结合起来，提出一种基于簇状结构的主被动式低功耗双向时间同步算法。实验表明，基于簇状结构的主被动式同步方式可有效解决传统双向报文交互频繁的问题，在误差允许范围内达到减少消息开销和平衡整个网络能量损耗的目的。
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