The utility model discloses a take stop gear's vertical rotary speed reducer, slewing bearing include outer ring gear, inner circle, inner circle fixed connection is in the seat circle of vertical base on the terminal surface, square flange, the axle housing of vertical base become integrative with seat circle fixed connection, the axial lead of axle housing is orthogonal with the axial lead of seat circle, and the worm is installed in the axle housing of vertical base, outer ring gear tooth portion and worm mesh, the external tooth circles the installation apron, apron reservation centre bore, the output flange be two circular flange and forms with seamless steel pipe's both ends fixed connection respectively, and the seamless steel pipe of output flange passes the apron and reserves centre bore and slewing bearing, and circular flange sets up in slewing bearing's both sides, hits a fixed connection on seamless steel pipe, cowl fixed connection outside the enclosing of vertical base on the terminal surface, it is spacing through cowl to hit the piece, vertical base is connected to defeated utensil, vertical pedestal connection stopper.