Micro-reducer is a key area of micro mechanical system.Based on the space curve meshing wheel

coplanar multiaxial output micro-reducer is introduced.Series and parallel structure forms of the reducer are introduced

which are named the equilateral planarpolygon axial distributive micro-reducer and the parallel multiaxial output micro-reducer

the transmission type and structure characteristic are analyzed

an application example is enumerated.Finally

the main research directions for the new reducer in industrial application are summarized.