For the purpose of eliminating the disadvantage of low efficiency with worm and gear transmission ,the paper briefly discusses the operating principle and structural features of a novel trans-mission mode ,which is fork-rod transmission .It also introduces the calculation and analysis of the out-put torque value .%为改变蜗轮-蜗杆传动效率低的弊端，文章简要论述了一种新的传动方式---叉-杆传动的工作原理和结构特点。介绍了叉-杆传动的输出扭矩值的计算和分析。
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