根据地壳结构、震源机制解、地震活动及地球物理探测等资料的综合分析,作者认为,在华北存在着由南西往北东为主的地壳物质重力水平扩展作用。本文分析了华北地壳物质重力水平扩展运动的基本特征及其对区内现代构造运动与地震活动的制约关系。 Based on the comprehensive analysis of the crustal structure, focal mechanism solution, seismic activity and geophysical exploration, the authors believe that there is an extension of the gravimetric horizontal extension of crustal materials dominated by the northwestern and western parts of North China. This paper analyzes the basic characteristics of crustal gravitational horizontal extension movement in North China and their constraints on the relationship between modern tectonic movement and seismic activity in the area.