Abstract: This paper studies the corresponding relation between the phase of Moon and the earthquakes with magnitudes more than 5.5 in North China and Shanxi region etc.in its adjcency in the period of 1940—1990.By the analysis of the fault zones in this region, the earthquakes are divided to occure along 4 fault zones, the relation between the earthquakes and the phase of Moon is dicussed fault zone by fault zone, The result shows that the earthquakes which occur in the syzygial period on 2 fault zones takes 57—60 percent of the total.This result is better than that of the earthquakes which are not divided by fault zone.