THE EVOLUTION CHARACTERS OF MAGNETIC FIELD AND VELOCITY FIELD IN SOLAR ACTIVE REGION AR5629

Using the solar magnetic field telescope on Huairou Station, We obtained some data of high-resolution photosphere vector magnetic field and chromosphere velocity field from Auguest 7, 1989 to Auguest 17, 1989. From these data, and obvious fact has been found. This is the permeations of the opposite magnetic polarity configuration near the natural lines. These permeations are probably the mechanism of triggering flare.Potential field configuration obtained under some assumptions accords well with the configuration of flare loops.