中文摘要：

近年来，接收函数已经成为一种重要的计算地壳厚度的方法，它是利用直达P波和Moho面转换S波震相的到时和振幅差来反演计算地壳的厚度和速度结构的．本文在传统的接收函数基础上，采用了多次反射波能量扫描求极大值和波形叠加反演的方法（H—Kappa方法）．该方法虽然需要较大的数据量，且要求数据的覆盖范围大，但具有能够同时快速准确地计算出地壳厚度H和Kappa值的突出优点．本文计算了中国国家台网记录到的大量震中距满足30°～90°、震级在5．5～7．0的远震P波的接收函数，从中挑选出了2233个信噪比较高、震相清晰的接收函数进行H—Kappa方法反演．结果表明：中国东部台站下方的地壳厚度为33～36km，中部地区的地壳厚度为38-45km，而青藏高原地区台站下方的地壳厚度则高达73km左右．总体上看，青藏高原地区的地壳厚度最大，天山、准格尔盆地、内蒙古大部地区次之，中国华南沿海一带地壳厚度更小，呈现出地壳厚度自西到东逐渐减薄的规律．

英文摘要：

In recent year, the receiver function method has become an important method for inversing crustal thickness, whose main process is to use the travel time and amplitude difference between the direct P and P-to-S at Moho discontinuity to inverse the crustal structure and thickness. In this paper, a multiply energy scan and waveform modeling inversion method （H-Kappa） was used, which is an advanced method compared to the traditional receiver function method. Though such H-Kappa method needs a large number of appropriate and well covered events, it can obtain the value of both crustal thickness and Kappa quickly and accurately. A large number of events recorded in the stations of China were calculated, whose gcarcs are from 30° to 90° and the magnitudes are from 5.5 to 7.0. We selected 2 233 receiver functions with high signal-to-noise ratio （SNR） and clear waveform, and performed the inversion by H-Kappa method. The results show that the crustal thickness ranges from 33 km to 36 km in the east of China, 38 km to 45 km in the middle of China to as much as 73 km in the Tibetan area. Overall, crustal thickness peaks in the Tibetan Plateau, decreasing in Tien Shan and its surrounding areas and thinning out in Southern China even thinner. In general, a gradual thinning in the thickness from west to east of China was clearly observable.