Using the Continuous Electromagnetic Profiling method (CEMP)，the author performed a survey in Longwei lake area of northern Qiangtang basin within Qinghai-Tibet plateau. This paper deals with the technique of data collection and data processing, gives the result of CEMP section and its interpretation. A comparison with the results obtained by such means as 2D reflection seismic survey, magnetotelluric sounding and verification of No. Qiang-Zi 1 borehole shows that the result of CEMP is effective and the method can be used in the investigation of shallow geological structures.