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Passive seismic reflection exploration is a low-cost, high-resolution method for imaging underground geologic structures from ambient noise without active source excitation. It has been widely used in many explorational fields. We introduced a case study of a two-dimensional (2D) passive seismic reflection exploration that was conducted in Tibet, China. The data were collected in a frozen soil area in Tibet, with a survey line length of 2.4 km, geophone spacing of 10m, and collection time of 72h. During data processing, after one-bit processing of the data, cross-correlation was used to retrieve 240 virtual shot gathers with a trace length of 5s. The conventional seismic data processing procedures obtained a high-quality final seismic image. The successful application of the passive seismic reflection method for shallow structure imaging provides a reference for further research on the passive source reflection method.