The invention belongs to a glow discharge electrode and particularly discloses an embedded glow discharge electrode. The embedded glow discharge electrode comprises a hollow flange, a vacuum electrical lead, an electrode tip and a shielding case; the electrode tip and the shielding case are positioned on one end of a vacuum side of the vacuum electrical lead; the electrode tip is arranged within the shielding case; one side of the shielding case sleeves the vacuum side of the vacuum electrical lead; and the other side of the shielding case is an opening. The embedded glow discharge electrode can avoid direct irradiation of plasma of deuterium and tritium, has a low water leakage risk, and guarantees the safety and reliability of a thermonuclear fusion experiment.