Powder ridge machine with underneath type main transmission mechanism

The invention provides a powder ridge machine with an underneath type main transmission mechanism and relates to farming machinery. The powder ridge machine comprises a sealed box body, a plurality of rotary cultivation tools, a main transmission mechanism and a secondary transmission mechanism, wherein the main transmission mechanism comprises a power input shaft, a driving conical gear mounted on a power input shaft and a driven conical gear engaged with the driving conical gear; the secondary transmission mechanism comprises a plurality of rotary cultivation shafts and inert wheel shafts; a cylindrical gear is mounted on the upper part of each rotary cultivation shaft and the bottom end of each rotary cultivation shaft stretches out of the sealed box body to be connected with the rotary cultivation tools to form a whole body; the tops of the inert wheel shafts are respectively staggered with the rotary cultivation shafts and are mounted on the sealed box body and inert wheels are mounted at the bottom ends