The utility model discloses a magnetic flux gathering ring structure of a vacuum arc extinguishing chamber. The magnetic flux gathering ring structure comprises a magnetic flux gathering ring, which is provided with a groove. The groove comprises a completely-cut broken groove and a plurality of upper grooves and lower grooves, which are arranged at equal intervals. The magnetic flux gathering ring structure of the vacuum arc extinguishing chamber is used to solve the problem of the conventional magnetic flux gathering ring that the bad influence of the magnetic field hysteresis caused by the vortex on the open end of the vacuum switch. The magnetic flux gathering ring structure of the vacuum arc extinguishing chamber is advantageous in that the intensity of the magnetic field can be enhanced, and the enhancement of the intensity of the magnetic field of the electrode edge can be greatly facilitated; and at the same time, the magnetic field distribution is more uniform, and the vortex gathered on the magnetic flux gathering ring can be greatly reduced, and therefore the magnetic field hysteresis can be reduced, and the successful switching on/off of the vacuum switch can be guaranteed.