Ridge crushing machine with main transmission mechanism arranged at lower portion

The utility model relates to a cultivation machine, in particular to a ridge crushing machine with a main transmission mechanism arranged at the lower portion. The ridge crushing machine with the main transmission mechanism arranged at the lower portion comprises a sealed box body, a plurality of rotary cultivators, the main transmission mechanism and a secondary transmission mechanism. The main transmission mechanism comprises a power input shaft, a driving bevel gear installed on the power input shaft, and a driven bevel gear meshed with the driving bevel gear. The secondary transmission mechanism comprises a plurality of rotary cultivation shafts and idler shafts, wherein a cylindrical gear is installed at the upper portion of each rotary cultivation shaft, the bottom end of each rotary cultivation shaft extends out of the sealed box body and connected with the corresponding rotary cultivator into a whole, the top ends of the idler shafts and the rotary cultivation shafts are arranged alternatively, the to