Material sowing system and plant protection unmanned aerial vehicle

The utility model discloses a material sowing system and a plant protection unmanned aerial vehicle, and relates to the technical field of aircrafts, the material sowing system comprises an undercarriage body, and an avoidance space is defined between a front side supporting part and a rear side supporting part of the undercarriage body; the scattering device is provided with a scattering opening used for scattering materials, and the receding space corresponds to the scattering opening and is used for receding the materials discharged by the scattering opening in the material scattering process. When the undercarriage body is applied to the material scattering system and the plant protection unmanned aerial vehicle, the scattering opening of the scattering device is opposite to the avoiding space, so that the scattering path of the scattering device in the material scattering process does not interfere with the undercarriage body, and when the scattering angle of the material scattering path is relatively wi