The utility model discloses a ground inserter for a solar lawn lamp, which comprises a ground inserter main body inserted into the grassland and an interface of the ground inserter and a cylinder, wherein the interface of the ground inserter and the cylinder extends out of the grassland; the interface of the ground inserter and the cylinder is in a cylinder shape matched with the inner wall of the cylinder; a leaf spring is arranged in the cylindrical interface; a small hole from which the leaf spring extends is formed on the wall of the cylindrical interface; and the tail end of the leaf spring is set to be a spherical structure, and the spherical structure extends out of the small hole. In the technical scheme of the utility model, an elastic part is mounted on the ground inserter and elastically assembled with a lamp cylinder to achieve permanent effectiveness and stable reliability. The elastic part can be embedded in the ground inserter or can be externally coated on the ground inserter; according to the elastic part, the deformation due to extrusion during matching can be effectively eliminated by using the elasticity and the hardness of the part; and the elastic part has a favorable return function so as to achieve the repeated plugging effect and ensure that the ground inserter is kept unloosened permanently. The reliability and the safety of the ground inserter are ensured.