Abstract: The relationship between the celestial tide-generating forces and activities of the blocking high over the eastern Asia in the mid summer is described. It is indicated that the formation, persistence and collapse of the blocking high over the eastern Asia is related to the resonance of tide-generating forces concerning with the astronomical singularities. The blocking high in the Baikal Lake and Sea of Ochotsk forms when the resonance pressure-increasing of three or/and more astronomical singularities occurs in two or three days. And then, the high will persist if the resonance pressure-increasing occurs successively. Finally, the collapse is brought out by the resonance pressure-decreasing. Some cases found in other regions, which lead to severe weather processes, are similar to those over the eastern Asia.