In this paper,the relationship between the earth rotation angular acceleration variation and strong earthquake activity along the Eurasian-Philippine Sea plate subduction zone from 1962 to 2016 has been investigated. The results show that 21 of 25 strong earthquakes(M_S ≥ 7.5)during the study on the western edge of the Philippines Sea plate occurred in the rising periods of the Earth rotation angular acceleration,proving the correlation between the strong seismic activity in the area and the earth rotation angular acceleration. Finally,the possible mechanical mechanism of this correlation is discussed.