本文指出在我国几个主要沉积盆地内岩石的密度和埋藏深度大致呈线性关系,因此,可将密度作为深度的函数来模拟密度剖面引起的重力值并和实际观测值拟合,进而求出密度界面的构造形态。文章列出密度界面的计算公式及在计算机上实现的步骤,最后通过实例的分析指出方法的优缺点。 This paper points out that the density of rock in several major sedimentary basins in China is approximately linear with the burial depth. Therefore, the density can be modeled as a function of depth to simulate the gravitational force caused by the density profile and fit with the observed value to obtain the density Structure of the interface. The paper lists the formulas of density interface and the steps that are implemented on the computer. Finally, the advantages and disadvantages of the method are pointed out through the analysis of the examples.