Automatic rape seedling transplanting device and transplanting method thereof

The invention provides an automatic rape seedling transplanting device, and relates to the technical field of agricultural instruments.The automatic rape seedling transplanting device comprises a vehicle body, the vehicle body is sequentially provided with a soil loosening mechanism, a pit forming mechanism and a planting mechanism from front to back, the vehicle body is further provided with a seedling feeding mechanism and an air pump, and the seedling feeding mechanism is provided with degradable conical planting cups; the planting mechanism comprises a cylinder connected with the vehicle body, a transverse cavity is formed in the side wall in the cylinder, a spring is installed in the transverse cavity, the spring is connected with a clamping pin with an upward inclined face, the degradable conical planting cup is provided with an edge abutting against the clamping pin, the air pump is connected with a hose, and the hose is connected with an L-shaped hard pipe penetrating into the cylinder and abutting ag