Abstract: As is well known the regional tectonic stress field is of great importance to the study of seismogenesis, earthquake prediction and earth dynamics. In this paper a synthetic analysis of current tensile stress field existing in the block-faulting tectonic areas of North China is given on the basis of observations and investigations of various phenomena such as seismogenetic structure, ground failure and seismic fault caused by a great earthquake, focal mechanism, the pattern of elastic rebound, the triggering of earthquake by tidal force and so on.In addition, the influence of the Pacific plate and the Indian plate on the tensile stress field in North China as a result of underthrusting of both plates under the Asian continent, is also discussed here, and it should be emphasized that the process occurring in the deep-seated portion of the earth crust must be of great importance to the tensile stress field present in North China.