NOVELTY - A solid oxide electrolytic cell sealing device comprises cathode chamber ceramic pipe (11), upper and lower sleeve, upper and lower golden ring, glass material (7), bolts (1), nuts (8) and solid oxide electrolytic cell. The lower sleeve (3) is sleeved on cathode chamber ceramic pipe and is fastened by three nuts. The lower golden ring (10) is disposed on upper end face of cathode chamber ceramic pipe. The solid oxide electrolytic cell is disposed on lower golden ring. The upper golden ring (4) is disposed on solid oxide electrolytic cell.    USE - A solid oxide electrolytic cell sealing device for preparing hydrogen by high temperature electrolysis. Can also be used in sealing fuel cell.    ADVANTAGE - The sealing device has good sealing property. The system pressure bearing ability is good. The sealing method is simple to operate. The electrolyte of solid oxide electrolytic cell completely covers side surface and part of outer surface of cathode and uses golden ring to seal, thus avoiding passivation caused by silicon to catalytic property of electrode in glass material.    DETAILED DESCRIPTION - A solid oxide electrolytic cell sealing device comprises cathode chamber ceramic pipe (11), upper and lower sleeve, upper and lower golden ring, glass material (7), bolts (1), nuts (8) and solid oxide electrolytic cell. The lower sleeve (3) is sleeved on cathode chamber ceramic pipe and is fastened by three nuts. The lower golden ring (10) is disposed on upper end face of cathode chamber ceramic pipe. The solid oxide electrolytic cell is disposed on lower golden ring. The upper golden ring (4) is disposed on solid oxide electrolytic cell. The upper sleeve (2) is provided on lower sleeve and upper golden ring, and is fastened with lower sleeve by three bolts. The glass material is provided in gap between upper sleeve and electrolytic cell to join with solid oxide electrolytic cell, upper and lower golden ring. The upper and lower golden ring and electrolyte (6) separate glass material from anode (5) and cathode (9). The upper and lower sleeve, bolts and nuts are made from KF-62(RTM: tungsten-carbon-cobalt alloy) high temperature alloy material capable of resisting high temperature at 1250 degrees C. The material of cathode chamber ceramic pipe is alumina or zirconia ceramic material. An INDEPENDENT CLAIM is included for a solid oxide electrolytic cell sealing method.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a solid oxide electrolytic cell sealing device.    Bolts (1)    Upper sleeve (2)    Lower sleeve (3)    Upper golden ring (4)    Anode (5)    Electrolyte (6)    Glass material (7)    Nuts (8)    Cathode (9)    Lower golden ring (10)    Cathode chamber ceramic pipe (11)