Abstract: Taking the advanced suspending spindle reducer as an example,for its key part-spindle wings,the running mechanics model are established.And the important parameters K₁,K₂,K₃,K₄ for designing mechanics construction and converting electricity are given out.The machine mainly consists of housing body,left and right support columns and closed box.It has advantages of good rigidity,good resistant vibration,good looking and clean working environment for driving system.The system is made up of two parts:mechanics and electronic systems.It has advantages of high inspecting precision,easily using.