The invention discloses a walking type cosmos bipinnata planting device with maintenance mechanisms. The device comprises a bottom plate and a traction engine hinged to the bottom plate, a sleeve is welded to the middle portion of the top of the bottom plate, the inner portion of the sleeve is movably in sleeved connection with a threaded rod, the two sides of the sleeve are provided with two setsof long-strip-shaped channels arranged in the length direction and communicated with the inner portion of the sleeve, an outer ring thread of the threaded rod is in sleeved connection with an annularsliding block, push rods slidably connected with the channels are welded to the two sides of the sliding block, movable plates are perpendicularly welded to the ends, stretching out of the sleeve, ofthe two sets of the push rods, the sides, away from each other, of the two sets of movable plates are slidably connected with supporting rods fixedly connected with the top of the bottom plate, the tops of the two sets of movable plates are movably in sleeved connection with rotating rods, and maintenance mechanisms are perpendicularly welded to the sides, away from each other, of the two sets ofrotating rods. The walking type cosmos bipinnata planting device with the maintenance mechanisms has the advantages that the structure is simple, the operation is convenient and fast, pruning of cosmos bipinnata plants with different heights can be achieved, the structure is stable, running is stable, and fertilization and pesticide spraying can also be carried out on cosmos bipinnata.