Disclosed is a seedling planting device. The seedling planting device is provided with a seedling feeding body and a union body, wherein the seedling feeding body is used for conveying operation through a seedling horizontal feeding shaft the union body can link and unify the seedling feeding body and a seedling carrying table and can convey the seedling carrying table through the seedling feeding body in the seedling planting device, one end of the union body (68) is detachably linked with a link base part (83) on the seedling feeding body (62) a feeding shaft cover (80) is arranged on cover clamping parts (81) which are arranged on two end parts of the seedling feeding body (62), and can cover a seedling horizontal feeding shaft (61) and the length (L1) in the moving direction of the seedling feeding body for the interval (D) between the cover clamping parts (81) and the link base part (83) is longer than the length (L2) of cover clamping parts (81) in the moving direction of the seedling feeding body. The seedling planting device can easily dismount the union body relative to the seedling feeding body.
