The invention discloses a space-planetary-gear-train wide-narrow-row-spaced oblique-Z-shaped maize transplanting mechanism. The maize transplanting mechanism can improve the ventilation and light transmittance among the existing maize pot seedling transplanted plants. The maize transplanting mechanism can realize the maize planting of a wide-narrow-row-spaced planting and oblique-Z-shaped planting combination; a first scheme for the transplanting mechanism is as follows: each transplanting component comprises a lower first intermediate bevel gear, a lower planetary shaft, a lower planetary bevel gear, a lower transplanting arm, a lower second intermediate bevel gear, a lower intermediate shaft, an upper intermediate shaft, an upper first intermediate bevel gear, an upper second intermediate bevel gear, an upper planetary shaft, an upper planetary bevel gear, an upper transplanting arm, a gearbox and a center bevel gear; a second scheme for the transplanting mechanism is as follows: each transplanting component comprises a lower planetary shaft, a lower planetary bevel gear, a lower transplanting arm, a lower intermediate shaft, a lower intermediate bevel gear, a center bevel gear, an upper intermediate shaft, an upper intermediate bevel gear, an upper planetary shaft, an upper planetary bevel gear, an upper transplanting arm and a gearbox. The space-planetary-gear-train wide-narrow-row-spaced oblique-Z-shaped maize transplanting mechanism has the advantage that the ventilation and light transmittance among the plants can be improved.