A ground insert lamp includes a fixed seat, a stake, a lamp body and a plurality of fasteners. The fixed seat includes a pedal and a connector integrally formed on the pedal. The connector has a periphery provided with a breach. The lamp body is removably mounted on the connector. The pedal has a periphery provided with an opening connected to the breach of the connector. The pedal has an upper face provided with a plurality of ribs. The pedal is provided with a slot corresponding to the stake and a plurality of fastening holes corresponding to the fasteners. The fixed seat is affixed to the ground by the stake or affixed to the wall by the fasteners.