根据人工地震、重力、大地电磁和地热资料，在天水地震区建立了二个综合地球物理剖面．对这两个剖面进行了分析，研究了该地区的壳幔结构．结果表明，沿西秦岭北缘断裂带，地壳变薄，低速层、低密层和低阻层同步出现，同时在断裂带附近形成了宽几十到上百公里的相变过渡带，其影响深度可达上地幔． Based on the artificial earthquakes, gravity, magnetotelluric and geothermal data, two integrated geophysical profiles have been established in the Tianshui earthquake area. The two sections were analyzed to study the crust-mantle structure in the area. The results show that along the northern margin of the western Qinling fault zone, the crustal thinning, low-velocity layer, low-density layer and low resistivity layer simultaneously appear, and in the vicinity of the fault zone formed tens to hundreds of kilometers wide transition zone, the impact Depth reach the upper mantle.