In this paper, author, on the basis of former performance, studied in detail through the analysis of energy stream's transmission mode and function principle in the mechanical transmission device. 本文分析了机械传动装置中能量流的传递方式及作用原理,在前人已有研究成果的基础上,对一种新型连续作用机械无级变速器进行了较为详细的研究。