This paper deals with the seismic genesis of M=6.3 Yangjiang earthquake in 1969 bymeans of the situation when the quake occurred, its focus geological background and epigene adjustment action.

• 本文根据阳江地震发生的情况、震源区地质背景、外因的调制作用；对阳江6.；4级地震成因进行了讨论。