Abstract: The vertical-component P-wave receiver function technique is used to extract the Moho multiples (PpPmp phase) and determine thickness of the crust beneath the Lanzhou Seismic Array. The multiples (PpPmp phase) are determined with waveforms from 16 teleseismic deep earthquakes, and then the average crust thickness is estimated, which value is about (51.6plusmn;1.8) km. This result is also consistent with the result of previous studies.