The utility model discloses a combined planting machine of seed stems and bars of cassava, which is characterized by comprising a machine frame as well as a seed-guiding part, a cutting part of seed stems and bars, a ditching part, a pressing and covering part which are respectively arranged on the machine frame, wherein the seed-guiding part is arranged at the upper end of the cutting part of the seed stems and bars; the ditching part is arranged at the lower end of the cutting part of the seed stems and bars; the pressing and covering part is arranged behind the ditching part. Compared with the existing planting, the combined planting machine can replace heavy labor of cutting seed stems manually, can improve the work quality and labor production efficiency of planting and has simple structure and reliable use.