Abstract Continuously variable transmission is one of the important development fields of the transmission technology of the automobile．The development trend of metal V-belt CVT is introduced, the basic structure and transmission principles of metal V-belt CVT are explicated, several technique characteristics such as performance, reliability, service life and cost are also comparatively described．The electro-hydraulic control technology of metal V-belt CVT is analyzed, and a conclusion is drawn that only a synthesized control system of CVT with electro-hydraulic control technology can satisfy modern autom obile requirement．
