Abstract: The economic value and the practicality of application of cement-soil anti-seepage wall has been verified and approved, and at present, the cement-soil wall has been used widely in engineering for various underground foundation anti-seepage treatment; due to the reason that the cement-soil wall belongs to concealed underground structure, and due to different geological conditions, different construction technology and different construction company’s quelifications, its quality varies a lot. This article, based on engineering examples, introduced a way of detection and measuring the quality of anti-seepage wall by application of seismic mapping (combined with borehole core abtaining and borehole water pressure test).