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青藏高原是印度板块和欧亚板块碰撞形成的巨大变形带，岩石圈地幔的变形特征对高原的隆升意义重大。本文分析了远震ＰＫＰ走时残差沿高原中部剖面的变化，发现莫霍面的断错在整个高原是普遍存在的；利用人工地震资料作为约束，用重力资料对莫霍面的形态进行了反演模拟，认为岩石圈地幔的断错和叠覆可能是青藏高原隆升的重要机制；最后讨论了板块运动、局部热和密度不均匀性以及地幔流动对青藏高原岩石圈变形的影响
The Tibetan Plateau is a tremendous deformation zone formed by the collision between the Indian plate and the Eurasian plate. The deformation characteristics of the lithospheric mantle are of great significance to the uplift of the plateau. In this paper, we analyze the variation of the PKP travel distance along the central part of the plateau, and find that the fault of Moho is ubiquitous throughout the plateau. Using artificial seismic data as a constraint, the morphology of the Moho is reversed with gravity data It is concluded that the fault rupture and overlying of the lithospheric mantle may be important mechanisms for the uplift of the Qinghai-Tibet Plateau. Finally, the effects of plate motion, local heat and density inhomogeneity and mantle flow on lithospheric deformation of the Qinghai-Tibet Plateau are discussed