Variable speed transmission twist control apparatuses and methods for self-propelled mowing machine

The invention claims is made of controlling such as mower that is communicated automatic machine device and method, wherein the grass cutter, attached to a comprising a housing and an auxiliary is connected to the shell handle to the shell and is advancing grass cutter's mechanical variable speed fixedly prime tractor. The variable speed reverse controller comprising to be adjusted opposite to the groove and long cylindrical main body, wherein the main body is provided with a guide wire a control and channel; and control cable connector to the mechanical variable speed driving device is a metal wire connection, for controlling a mechanical variable speed driving device, thus, capable of controlling automatic speed one of mower through the operation reverse controller.