华南包括扬子和华夏地块，出露有宽达千余公里的火山岩，并显示出了中间老两侧新的特点。不同的岩性及年龄可能对应不同的地球物理属性，如：S波速度，Q值等。本研究拟通过利用华南连县-港口长约400公里的宽角地震剖面的S波震相，以研究区已有的P波速度模型为基础，通过偏振分析拾取S波震相，然后反演地壳的S波速度结构；使用频谱比值方法求取地震波型中S波震相的衰减量；根据射线路径，建立方程，进行地壳Q值成像，对比分析S波速度结构与Q值的关系；并将其应用于华南具典型特征的多条剖面，以火山岩分布为纽带，研究华南地区地震波属性的横向变化，从而为华夏与扬子块体的边界提供地震学证据，并讨论其动力学意义。

South China is featured by Mesozoic intraplate orogeny occupying a width of about 1300 km at the same time that by an increase of the postorogenic magmatic activity that extends to the sea.Various rock and age may correspond to different geophysics attributes, such as shear wave velocity, Q-value ect. Shear wave velocity and Q-value are investigated in this project through a 400 km-long wide-angle seismic profile running from Lianxian to Gangkou Island in South China. P-wave velocity as background. Then attenuation was simulated using frequency-spectrum ratio method; and image Q-value in crust after building equation based on raypath; compare and analysis the relationship between shear-wave velocity and Q-value; then applied them to several profiles, and take distribute of volcanic rock as linkage to research lateral variation of seismic wave attributes in South China, then provide seismic evidence of bounary of Yangtze and Cathaysia block, then discuss their dynamic implications.